[opensuse] SSD alignement-option in partitioner usefull ?
Hi folks, After a disaster with hdparm security-erase before an action to align the partions and the filesystem properly on an ssd, my ssd became fully uncommunicative. Now to my opinion,it is desirable that the opensuse partitioner has an ssd option to align partition and filesystem properly on this this type of devices. Is this a good idea and a reasonable expectation ? For reference only see the ocz website, for instance this thread. http://www.ocztechnologyforum.com/forum/showthread.php?77769-A-Simple-How-To... Thanks, Hans -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
El 17/04/11 08:38, Hans de Faber escribió:
Hi folks, After a disaster with hdparm security-erase before an action to align the partions and the filesystem properly on an ssd, my ssd became fully uncommunicative.
Interesting, I have used ssd security erase at least two times, and no problems.. why your SSD got "bricked" ? did forcing a firmware upgrade recovered it ?
Now to my opinion,it is desirable that the opensuse partitioner has an ssd option to align partition and filesystem properly on this this type of devices. Is this a good idea and a reasonable expectation ?
Yes, it is a good idea, but it will not go anywhere here, fill a feature request in FATE. Thanks,. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
Hans de Faber wrote:
Now to my opinion,it is desirable that the opensuse partitioner has an ssd option to align partition and filesystem properly on this this type of devices. Is this a good idea and a reasonable expectation ?
I though we already had that implemented. but I have no personal experience with yast+ssd. -- Per Jessen, Zürich (16.4°C) -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
El 17/04/11 13:32, Per Jessen escribió:
Hans de Faber wrote:
Now to my opinion,it is desirable that the opensuse partitioner has an ssd option to align partition and filesystem properly on this this type of devices. Is this a good idea and a reasonable expectation ?
I though we already had that implemented. but I have no personal experience with yast+ssd.
It doesnt align SSD partitions automagically, IMHO it should do something like this http://ldn.linuxfoundation.org/blog-entry/aligning-filesystems-ssd%E2 %80%99s-erase-block-size but it doesnt, in fact I checked out and there is not even a method to detect if the target system has an SSD drive or not, and is not trivial to do so,either. :| -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
On Sun, Apr 17, 2011 at 13:14, Cristian Rodríguez <crrodriguez@opensuse.org> wrote:
El 17/04/11 13:32, Per Jessen escribió:
Hans de Faber wrote:
Now to my opinion,it is desirable that the opensuse partitioner has an ssd option to align partition and filesystem properly on this this type of devices. Is this a good idea and a reasonable expectation ?
I though we already had that implemented. but I have no personal experience with yast+ssd.
It doesnt align SSD partitions automagically, IMHO it should do something like this
http://ldn.linuxfoundation.org/blog-entry/aligning-filesystems-ssd%E2 %80%99s-erase-block-size
but it doesnt, in fact I checked out and there is not even a method to detect if the target system has an SSD drive or not, and is not trivial to do so,either. :|
-- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
I was told on here it should be done, but I see the same results as you.. .the system doesn't know the drive has different size sectors an nothing is different. BUT for SSD the system should know by the reported rotational speed of the drive, but that has nothing to do with partition alignment. -- Med Vennlig Hilsen, A. Helge Joakimsen -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
El 17/04/11 15:22, Andrew Joakimsen escribió:
BUT for SSD the system should know by the reported rotational speed of the drive, but that has nothing to do with partition alignment.
It is not that easy unfortunately, some ssd drives do not report themselves as non-rotational and/or use fake rotational speed numbers .. Does yours ? Mine does cat /sys/block/sdb/queue/rotational 0 -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
On Sun, Apr 17, 2011 at 12:32, Per Jessen <per@opensuse.org> wrote:
Hans de Faber wrote:
Now to my opinion,it is desirable that the opensuse partitioner has an ssd option to align partition and filesystem properly on this this type of devices. Is this a good idea and a reasonable expectation ?
I though we already had that implemented. but I have no personal experience with yast+ssd.
-- Per Jessen, Zürich (16.4°C)
-- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
Sure, but the issue is many of these disks don't properly report their geometry. IMO, the best solution would be to have Yast show the partition data in sectors, not the current meaningless "cylinders" then the user who understands what is going on can make sure it is setup properly. There is no formula to convert from cylinders to sectors! This issue is also affecting newer/larger hard drives. And these without a doubt have 4kb sectors but everything in opensuse shows 512 bytes! -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
Hello, On Sun, 17 Apr 2011, Andrew Joakimsen wrote:
understands what is going on can make sure it is setup properly. There is no formula to convert from cylinders to sectors!
http://en.wikipedia.org/wiki/Cylinder-head-sector#CHS_to_LBA_mapping
This issue is also affecting newer/larger hard drives. And these without a doubt have 4kb sectors but everything in opensuse shows 512 bytes!
The _drives_ don't tell their real sector sizes! # /sbin/hdparm -I /dev/sdb [..] Model Number: SAMSUNG HD204UI [..] LBA48 user addressable sectors: 3907029168 Logical Sector size: 512 bytes Physical Sector size: 512 bytes This is what the disk tells via the ATA interface. And yes, that is a disk with 4K physical sectors, which is why I partitioned aligned to 4K. There is just no way for Yast or any other tool to know. One could create a database of 4K-disks reporting 512B sectors though. -dnh -- A funny symbol that I can't read has just been input. Continue, and I'll forget that it ever happened. -- a TeX message -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
On Mon, Apr 18, 2011 at 06:18, David Haller <dnh@opensuse.org> wrote:
Hello,
On Sun, 17 Apr 2011, Andrew Joakimsen wrote:
understands what is going on can make sure it is setup properly. There is no formula to convert from cylinders to sectors!
http://en.wikipedia.org/wiki/Cylinder-head-sector#CHS_to_LBA_mapping
This issue is also affecting newer/larger hard drives. And these without a doubt have 4kb sectors but everything in opensuse shows 512 bytes!
The _drives_ don't tell their real sector sizes!
# /sbin/hdparm -I /dev/sdb [..] Model Number: SAMSUNG HD204UI [..] LBA48 user addressable sectors: 3907029168 Logical Sector size: 512 bytes Physical Sector size: 512 bytes
This is what the disk tells via the ATA interface. And yes, that is a disk with 4K physical sectors, which is why I partitioned aligned to 4K. There is just no way for Yast or any other tool to know. One could create a database of 4K-disks reporting 512B sectors though.
Right that's what I said basically and hence my proposal that Yast shows disks in the relevant unit of "sectors" and not the antiquated useless term of "cylinders." If you know your disk needs to be aligned to X size sectors you can calculate it yourself and set it up with no hassle. But in the current arragement, since there's no universal formula to convert cylinders to sectors and yast only shows the former, you need to e.g. boot a live CD, create your partitions with some clunky 3rd party tool and then do your installation. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
On 4/18/2011 1:28 PM, Andrew Joakimsen wrote:
On Mon, Apr 18, 2011 at 06:18, David Haller<dnh@opensuse.org> wrote:
Hello,
On Sun, 17 Apr 2011, Andrew Joakimsen wrote:
understands what is going on can make sure it is setup properly. There is no formula to convert from cylinders to sectors!
http://en.wikipedia.org/wiki/Cylinder-head-sector#CHS_to_LBA_mapping
This issue is also affecting newer/larger hard drives. And these without a doubt have 4kb sectors but everything in opensuse shows 512 bytes!
The _drives_ don't tell their real sector sizes!
# /sbin/hdparm -I /dev/sdb [..] Model Number: SAMSUNG HD204UI [..] LBA48 user addressable sectors: 3907029168 Logical Sector size: 512 bytes Physical Sector size: 512 bytes
This is what the disk tells via the ATA interface. And yes, that is a disk with 4K physical sectors, which is why I partitioned aligned to 4K. There is just no way for Yast or any other tool to know. One could create a database of 4K-disks reporting 512B sectors though.
Right that's what I said basically and hence my proposal that Yast shows disks in the relevant unit of "sectors" and not the antiquated useless term of "cylinders." If you know your disk needs to be aligned to X size sectors you can calculate it yourself and set it up with no hassle.
But in the current arragement, since there's no universal formula to convert cylinders to sectors and yast only shows the former, you need to e.g. boot a live CD, create your partitions with some clunky 3rd party tool and then do your installation.
Hyperbole. I routinely perform manual-custom partitioning and mdadm tasks pre-install right in the regular old ordinary opensuse installer, as part of the same session. If you'r at the console just flip over to one of the other text consoles and use fdsik, sfdisk, parted, mdadm all you want and set up anything you want, then resume the install already in progress. In my case I'm also always remote from the machine so I use a serial text console to boot and ssh for the rest of the install. It that case it's just as easy to either do the low level stuff before launching yast, or in a another ssh session after yast has already started. Even without ssh just pure, single tty serial, there are menu options in the initial curses/dialog menus to get a shell before launching yast. It's slightly inconvenient having to do things manually that could be automated or at least made more convenient with menu/form driven front ends, but it's hardly a problem. No booting a separate livecd or even re-starting the same suse installer. Just drop to a shell, do your thing, resume. -- bkw -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
Hello, On Mon, 18 Apr 2011, Brian K. White wrote:
I routinely perform manual-custom partitioning and mdadm tasks pre-install right in the regular old ordinary opensuse installer, as part of the same session. If you'r at the console just flip over to one of the other text consoles and use fdsik, sfdisk, parted, mdadm all you want and set up anything you want, then resume the install already in progress.
ACK. I've yet to have _ONE_ installer propose something even remotely resembling what I want. Be it Win 3.11, Win95, SuSE 5.3-11.2, Debian 1.2 - (can't remember), ... But yes, Yast should default to a 4k-compatible alignment with the next release at latest ... For Win-compat probably to 1MiB alignment. -dnh -- Ashamed of it? Perhaps you're an MCSE? I'm pretty sure that even a pot plant could pass that test, so if you said you were an MCSE I'd be quite likely to actually believe you. -- Lionel, asr -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
On Mon, Apr 18, 2011 at 1:28 PM, Andrew Joakimsen <joakimsen@gmail.com> wrote:
On Mon, Apr 18, 2011 at 06:18, David Haller <dnh@opensuse.org> wrote:
Hello,
On Sun, 17 Apr 2011, Andrew Joakimsen wrote:
understands what is going on can make sure it is setup properly. There is no formula to convert from cylinders to sectors!
http://en.wikipedia.org/wiki/Cylinder-head-sector#CHS_to_LBA_mapping
This issue is also affecting newer/larger hard drives. And these without a doubt have 4kb sectors but everything in opensuse shows 512 bytes!
The _drives_ don't tell their real sector sizes!
# /sbin/hdparm -I /dev/sdb [..] Model Number: SAMSUNG HD204UI [..] LBA48 user addressable sectors: 3907029168 Logical Sector size: 512 bytes Physical Sector size: 512 bytes
This is what the disk tells via the ATA interface. And yes, that is a disk with 4K physical sectors, which is why I partitioned aligned to 4K. There is just no way for Yast or any other tool to know. One could create a database of 4K-disks reporting 512B sectors though.
Right that's what I said basically and hence my proposal that Yast shows disks in the relevant unit of "sectors" and not the antiquated useless term of "cylinders." If you know your disk needs to be aligned to X size sectors you can calculate it yourself and set it up with no hassle.
But in the current arragement, since there's no universal formula to convert cylinders to sectors and yast only shows the former, you need to e.g. boot a live CD, create your partitions with some clunky 3rd party tool and then do your installation.
If you'll post the openFATE link to your proposal, I'll add my vote. Greg -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
Andrew, Is there a openfate proposal? They are easy to create. Any opensuse user with a login can do it. Since this is not a bug, just a functionality change proposal, bugzilla is not the right place. Greg On 4/18/11, Greg Freemyer <greg.freemyer@gmail.com> wrote:
On Mon, Apr 18, 2011 at 1:28 PM, Andrew Joakimsen <joakimsen@gmail.com> wrote:
On Mon, Apr 18, 2011 at 06:18, David Haller <dnh@opensuse.org> wrote:
Hello,
On Sun, 17 Apr 2011, Andrew Joakimsen wrote:
understands what is going on can make sure it is setup properly. There is no formula to convert from cylinders to sectors!
http://en.wikipedia.org/wiki/Cylinder-head-sector#CHS_to_LBA_mapping
This issue is also affecting newer/larger hard drives. And these without a doubt have 4kb sectors but everything in opensuse shows 512 bytes!
The _drives_ don't tell their real sector sizes!
# /sbin/hdparm -I /dev/sdb [..] Model Number: SAMSUNG HD204UI [..] LBA48 user addressable sectors: 3907029168 Logical Sector size: 512 bytes Physical Sector size: 512 bytes
This is what the disk tells via the ATA interface. And yes, that is a disk with 4K physical sectors, which is why I partitioned aligned to 4K. There is just no way for Yast or any other tool to know. One could create a database of 4K-disks reporting 512B sectors though.
Right that's what I said basically and hence my proposal that Yast shows disks in the relevant unit of "sectors" and not the antiquated useless term of "cylinders." If you know your disk needs to be aligned to X size sectors you can calculate it yourself and set it up with no hassle.
But in the current arragement, since there's no universal formula to convert cylinders to sectors and yast only shows the former, you need to e.g. boot a live CD, create your partitions with some clunky 3rd party tool and then do your installation.
If you'll post the openFATE link to your proposal, I'll add my vote.
Greg
-- Sent from my mobile device Greg Freemyer Head of EDD Tape Extraction and Processing team Litigation Triage Solutions Specialist http://www.linkedin.com/in/gregfreemyer CNN/TruTV Aired Forensic Imaging Demo - http://insession.blogs.cnn.com/2010/03/23/how-computer-evidence-gets-retriev... The Norcross Group The Intersection of Evidence & Technology http://www.norcrossgroup.com -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
On Fri, Apr 22, 2011 at 08:14, Greg Freemyer <greg.freemyer@gmail.com> wrote:
Andrew,
Is there a openfate proposal? They are easy to create. Any opensuse user with a login can do it.
Since this is not a bug, just a functionality change proposal, bugzilla is not the right place.
Greg
On 4/18/11, Greg Freemyer <greg.freemyer@gmail.com> wrote:
On Mon, Apr 18, 2011 at 1:28 PM, Andrew Joakimsen <joakimsen@gmail.com> wrote:
On Mon, Apr 18, 2011 at 06:18, David Haller <dnh@opensuse.org> wrote:
Hello,
On Sun, 17 Apr 2011, Andrew Joakimsen wrote:
understands what is going on can make sure it is setup properly. There is no formula to convert from cylinders to sectors!
http://en.wikipedia.org/wiki/Cylinder-head-sector#CHS_to_LBA_mapping
This issue is also affecting newer/larger hard drives. And these without a doubt have 4kb sectors but everything in opensuse shows 512 bytes!
The _drives_ don't tell their real sector sizes!
# /sbin/hdparm -I /dev/sdb [..] Model Number: SAMSUNG HD204UI [..] LBA48 user addressable sectors: 3907029168 Logical Sector size: 512 bytes Physical Sector size: 512 bytes
This is what the disk tells via the ATA interface. And yes, that is a disk with 4K physical sectors, which is why I partitioned aligned to 4K. There is just no way for Yast or any other tool to know. One could create a database of 4K-disks reporting 512B sectors though.
Right that's what I said basically and hence my proposal that Yast shows disks in the relevant unit of "sectors" and not the antiquated useless term of "cylinders." If you know your disk needs to be aligned to X size sectors you can calculate it yourself and set it up with no hassle.
But in the current arragement, since there's no universal formula to convert cylinders to sectors and yast only shows the former, you need to e.g. boot a live CD, create your partitions with some clunky 3rd party tool and then do your installation.
If you'll post the openFATE link to your proposal, I'll add my vote.
Greg
The current functionality is a bug and I have long ago reported it as such. Disks are addressed by logical sectors this millenium. It's a bug to show an obsolete, not-convertible unit. serves no purpose unit. The fix to that bug is to show the relevant unit. But if you insist, I submitted this bug as a feature: https://features.opensuse.org/312273 -- Med Vennlig Hilsen, A. Helge Joakimsen -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
On Fri, Apr 22, 2011 at 4:46 PM, Andrew Joakimsen <joakimsen@gmail.com> wrote:
On Fri, Apr 22, 2011 at 08:14, Greg Freemyer <greg.freemyer@gmail.com> wrote:
Andrew,
Is there a openfate proposal? They are easy to create. Any opensuse user with a login can do it.
Since this is not a bug, just a functionality change proposal, bugzilla is not the right place.
Greg
On 4/18/11, Greg Freemyer <greg.freemyer@gmail.com> wrote:
On Mon, Apr 18, 2011 at 1:28 PM, Andrew Joakimsen <joakimsen@gmail.com> wrote:
On Mon, Apr 18, 2011 at 06:18, David Haller <dnh@opensuse.org> wrote:
Hello,
On Sun, 17 Apr 2011, Andrew Joakimsen wrote:
understands what is going on can make sure it is setup properly. There is no formula to convert from cylinders to sectors!
http://en.wikipedia.org/wiki/Cylinder-head-sector#CHS_to_LBA_mapping
This issue is also affecting newer/larger hard drives. And these without a doubt have 4kb sectors but everything in opensuse shows 512 bytes!
The _drives_ don't tell their real sector sizes!
# /sbin/hdparm -I /dev/sdb [..] Model Number: SAMSUNG HD204UI [..] LBA48 user addressable sectors: 3907029168 Logical Sector size: 512 bytes Physical Sector size: 512 bytes
This is what the disk tells via the ATA interface. And yes, that is a disk with 4K physical sectors, which is why I partitioned aligned to 4K. There is just no way for Yast or any other tool to know. One could create a database of 4K-disks reporting 512B sectors though.
Right that's what I said basically and hence my proposal that Yast shows disks in the relevant unit of "sectors" and not the antiquated useless term of "cylinders." If you know your disk needs to be aligned to X size sectors you can calculate it yourself and set it up with no hassle.
But in the current arragement, since there's no universal formula to convert cylinders to sectors and yast only shows the former, you need to e.g. boot a live CD, create your partitions with some clunky 3rd party tool and then do your installation.
If you'll post the openFATE link to your proposal, I'll add my vote.
Greg
The current functionality is a bug and I have long ago reported it as such. Disks are addressed by logical sectors this millenium. It's a bug to show an obsolete, not-convertible unit. serves no purpose unit. The fix to that bug is to show the relevant unit.
But if you insist, I submitted this bug as a feature: https://features.opensuse.org/312273 -- Med Vennlig Hilsen,
A. Helge Joakimsen
Andrew, I just changed the title and added a new summary description. https://features.opensuse.org/312273 Since its your feature request, you might want to ensure I got it right. Greg -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
On Mon, Apr 25, 2011 at 14:46, Greg Freemyer <greg.freemyer@gmail.com> wrote:
On Fri, Apr 22, 2011 at 4:46 PM, Andrew Joakimsen <joakimsen@gmail.com> wrote:
On Fri, Apr 22, 2011 at 08:14, Greg Freemyer <greg.freemyer@gmail.com> wrote:
Andrew,
Is there a openfate proposal? They are easy to create. Any opensuse user with a login can do it.
Since this is not a bug, just a functionality change proposal, bugzilla is not the right place.
Greg
On 4/18/11, Greg Freemyer <greg.freemyer@gmail.com> wrote:
On Mon, Apr 18, 2011 at 1:28 PM, Andrew Joakimsen <joakimsen@gmail.com> wrote:
On Mon, Apr 18, 2011 at 06:18, David Haller <dnh@opensuse.org> wrote:
Hello,
On Sun, 17 Apr 2011, Andrew Joakimsen wrote: >understands what is going on can make sure it is setup properly. There >is no formula to convert from cylinders to sectors!
http://en.wikipedia.org/wiki/Cylinder-head-sector#CHS_to_LBA_mapping
>This issue is also affecting newer/larger hard drives. And these >without a doubt have 4kb sectors but everything in opensuse shows 512 >bytes!
The _drives_ don't tell their real sector sizes!
# /sbin/hdparm -I /dev/sdb [..] Model Number: SAMSUNG HD204UI [..] LBA48 user addressable sectors: 3907029168 Logical Sector size: 512 bytes Physical Sector size: 512 bytes
This is what the disk tells via the ATA interface. And yes, that is a disk with 4K physical sectors, which is why I partitioned aligned to 4K. There is just no way for Yast or any other tool to know. One could create a database of 4K-disks reporting 512B sectors though.
Right that's what I said basically and hence my proposal that Yast shows disks in the relevant unit of "sectors" and not the antiquated useless term of "cylinders." If you know your disk needs to be aligned to X size sectors you can calculate it yourself and set it up with no hassle.
But in the current arragement, since there's no universal formula to convert cylinders to sectors and yast only shows the former, you need to e.g. boot a live CD, create your partitions with some clunky 3rd party tool and then do your installation.
If you'll post the openFATE link to your proposal, I'll add my vote.
Greg
The current functionality is a bug and I have long ago reported it as such. Disks are addressed by logical sectors this millenium. It's a bug to show an obsolete, not-convertible unit. serves no purpose unit. The fix to that bug is to show the relevant unit.
But if you insist, I submitted this bug as a feature: https://features.opensuse.org/312273 -- Med Vennlig Hilsen,
A. Helge Joakimsen
Andrew,
I just changed the title and added a new summary description.
https://features.opensuse.org/312273
Since its your feature request, you might want to ensure I got it right.
Greg
I still believe it's a bug. And knowing now that internally the paritioner was changed to use sectors, it screams bug even louder. I've updated the bug report with the new information you've shared with me: https://bugzilla.novell.com/show_bug.cgi?id=671071 -- Med Vennlig Hilsen, A. Helge Joakimsen -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
* David Haller <dnh@opensuse.org> [01-01-70 12:34]:
The _drives_ don't tell their real sector sizes!
# /sbin/hdparm -I /dev/sdb [..] Model Number: SAMSUNG HD204UI [..] LBA48 user addressable sectors: 3907029168 Logical Sector size: 512 bytes Physical Sector size: 512 bytes
This is what the disk tells via the ATA interface. And yes, that is a disk with 4K physical sectors, which is why I partitioned aligned to 4K. There is just no way for Yast or any other tool to know. One could create a database of 4K-disks reporting 512B sectors though.
I have a 120gb intel, hdparm -I /dev/sdc: http://wahoo.no-ip.org/~pat/ssd-parms.txt -- (paka)Patrick Shanahan Plainfield, Indiana, USA HOG # US1244711 http://wahoo.no-ip.org Photo Album: http://wahoo.no-ip.org/gallery2 http://en.opensuse.org openSUSE Community Member Registered Linux User #207535 @ http://counter.li.org -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
Hello, On Mon, 18 Apr 2011, Patrick Shanahan wrote:
* David Haller <dnh@opensuse.org> [01-01-70 12:34]:
The _drives_ don't tell their real sector sizes!
I have a 120gb intel, hdparm -I /dev/sdc:
Logical Sector size: 512 bytes Physical Sector size: 512 bytes With SSDs, that is definitely wrong, AFAIK most use blocks of 128kB, which have to be "Read-Modified-Write" if say, a 4k Block of a file is modified. See e.g. http://techreport.com/articles.x/15433 Searching for »Intel SSD block size« (or »... blocksize«) yields more results. No software can read the blocksize though, that "blocksize" is "internal" to that SSD (and most current SATA drives with 4K blocks) and they lie to the "outside". A real PITA if you ask me, make it "jumperable" if need be, but there definitely should be a way to ask drives for their real blocksize. -dnh -- Top 100 things you don't want the sysadmin to say: 47. Say, What does "Superblock Error" mean, anyhow? -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
On Thu, Apr 21, 2011 at 11:36, David Haller <dnh@opensuse.org> wrote:
Hello,
On Mon, 18 Apr 2011, Patrick Shanahan wrote:
* David Haller <dnh@opensuse.org> [01-01-70 12:34]:
The _drives_ don't tell their real sector sizes!
I have a 120gb intel, hdparm -I /dev/sdc:
Logical Sector size: 512 bytes Physical Sector size: 512 bytes
With SSDs, that is definitely wrong, AFAIK most use blocks of 128kB, which have to be "Read-Modified-Write" if say, a 4k Block of a file is modified. See e.g. http://techreport.com/articles.x/15433 Searching for »Intel SSD block size« (or »... blocksize«) yields more results. No software can read the blocksize though, that "blocksize" is "internal" to that SSD (and most current SATA drives with 4K blocks) and they lie to the "outside". A real PITA if you ask me, make it "jumperable" if need be, but there definitely should be a way to ask drives for their real blocksize.
This is because BIOS is not compatible with anything but 512-byte sectors. Anyways all of this is moot. What I've discovered is in openSUSE 11.3 and 11.4 the partitions are aligned to 4kb sectors fine, you will notice that if you issue the command: fdlisk -u=sectors -l All the starting sectors of the partition are divisible by 8. 8 * 512 bytes = 4kb, and that's all there is to it. -- Med Vennlig Hilsen, A. Helge Joakimsen -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
Hello, On Thu, 21 Apr 2011, Andrew Joakimsen wrote:
This is because BIOS is not compatible with anything but 512-byte sectors.
How then can your BIOS boot from a CD/DVD with 2048 Byte sectors? -dnh -- "Now, what was I doing before I so rudely interrupted myself?" -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
On Sun, Apr 17, 2011 at 7:38 AM, Hans de Faber <hans.defaber@gmail.com> wrote:
Hi folks, After a disaster with hdparm security-erase before an action to align the partions and the filesystem properly on an ssd, my ssd became fully uncommunicative. Now to my opinion,it is desirable that the opensuse partitioner has an ssd option to align partition and filesystem properly on this this type of devices. Is this a good idea and a reasonable expectation ?
For reference only see the ocz website, for instance this thread. http://www.ocztechnologyforum.com/forum/showthread.php?77769-A-Simple-How-To...
Thanks, Hans
Are you guys sure this doesn't already work: If yast partitioner / installer is not following this logic it's a bug: 1) Default all partition starts to 1MB boundaries. (That is ignore cylinders, etc.) 2) Get physical sector geometry from block subsystem. If it does not align with 1MB, then move the starting sector to align. So a 4KB physical sector works fine with 1MB. So does a 128KB erase block on a SSD. But a raid5 would typically not align, so if mdraid is properly reporting, yast-partitioner should override 1MB to align with the raid stripe. Again, if the above is not true, its a bug. Greg -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
participants (8)
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Andrew Joakimsen -
Brian K. White -
Cristian Rodríguez -
David Haller -
Greg Freemyer -
Hans de Faber -
Patrick Shanahan -
Per Jessen