Ken Schneider - openSUSE wrote:

On 04/30/12 15:01, Bob Williams pecked at the keyboard and wrote:

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On 30/04/12 19:51, Dirk Gently wrote:

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download.opensuse.org pings back, but does not respond to http or ftp connections.

Apparently, both disks in their RAID array went belly up simultaneously :(

It's not "both disks" but two of many, at the same time. So there must not have been any hot spares or were already in use and not noticed.

Even with hot spares, the array will be running degraded until it's fully synced. With terabyte size disks, a resync can take quite a while = window for disaster if a 2nd disk break. -- Per Jessen, Zürich (13.1°C) -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org

Dave Howorth wrote:

Per Jessen wrote:

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Even with hot spares, the array will be running degraded until it's fully synced. With terabyte size disks, a resync can take quite a while = window for disaster if a 2nd disk break.

Right. RAID 5 is not a good idea with big disks. RAID 6 is better if the hardware is capable of it. Otherwise mdadm RAID 10 seems like a good compromise.

------ I disagree. 1) RAID is no substitute for regular backups. 2) RAID 6 even in hardware created a noticeable penalty, while RAID5 gets close to RAID0 speeds on READS and most WRITES. IF you have enough disks to do RAID 10, then you probably have enough to do 1 RAID5 and a another RAID5 dedicated to backup storage. Using tower of hanoi rotation one can minimize space for daily backups while requiring at most 4-5 restores from separate sources to bring up to the latest day (usually 2-3). FWIW, I use a RAID-50 3RAID5's (4data+3par) in a RAID0 + 1 spare. I figure statistically a RAID5 with 4 data discs is about the limit of safety for RAID5, but with 2-3TB /HD .. I very much sympathize with SUSE... been there, had this happen -- and I was the one who killed the 2nd disk (on trying to replace the faulty one, of course counted from wrong direction...me<==*bang*) -- all downloaded/internet content. 5-6T...*ouch* Only 1 6T volume with downloaded material wasn't regularly backed up (don't have the space for more than a duplicate and that's tight). Rest of system is backed up with dump/restore (xfs). But starting out, it was just downloaded stuff...thought I could always D/l it again...but at some point... *ouch*... it got past a size I wanted to D/l again. I learned...fortunately it was d/l'able stuff, so most was recoverable and my system disk and main server shares for serving local material to my PC(s) is fully backed up. The backups are on a separate set of disks...though sharing same enclosure...(ouch)... Anyway, bad things happen once in a while...I still don't think RAID6 is worth the overhead for as often as this type of thing happens. If you were a bank? Yeah..sure... but Open suse doesn't need 5-9's of uptime (99.999%) -- that's a reason for mirrors... (FWIW, I don't know of anyone who keeps regular backups like me...I'm a bit paranoid)...few companies do either I would note -- unless they have dedicated IT departments...which I doubt Opensuse has given they are an open source company -- they really have alot of dedicated IT staff in my limited experience. ;-(....). Condolences... -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org

On 05/03/2012 05:20 AM, Linda Walsh wrote:

I disagree. 1) RAID is no substitute for regular backups. 2) RAID 6 even in hardware created a noticeable penalty, while RAID5 gets close to RAID0 speeds on READS and most WRITES.

True, but a good RAID can reduce the number of times you have to go to the tapes. I've heard that RAID-6 is slower than RAID-5, but I've never been able to measure the difference myself. I think that RAID-5 can lead one into a false sense of security. Once you have a disk failure you've used up all your redundancy. Now, when you replace the defective disk you are susceptible during the intense rebuild process to a second disk failure. RAID-6 gives redundancy for the all important rebuild. I think that RAID-6 is the choice if bandwidth and capacity allows. Regarding bandwidth, RAID-60 is great! I measured a write rate of 1.3-GB/sec on a 22 disk RAID-60 array recent.y. RAID-60 is a stripe of two or more RAID-6 arrays. Regards, Lew -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org

[30.04.2012 22:04] [Greg Freemyer]:

On Mon, Apr 30, 2012 at 2:51 PM, Dirk Gently wrote:

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download.opensuse.org pings back, but does not respond to http or ftp connections. --

If you have to get something, you can look on http://widehat.opensuse.org/

I don't know how complete that is, but it was mentioned as an alternative source of RPMs in the message about download.o.o being down.

Greg

Hi Greg, yes it was meant to be so, but currently I get the same "access denied" errors from widehat.o.o as I get from download.o.o. Even the automatic switching to the mirrors seems not to work, and "dig download.opensuse.org" only returns one address, while it sometimes delivered a pool of addresses (round robin DNS). Oh, where have the good old times gone? :-) Since both systems have different addresses (in both IPv4 and IPv6), they seem to have the same disease :-( Just my 2¢, Werner -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org

Il 01/05/2012 03:44, Per Jessen ha scritto:

Dirk Gently wrote:

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download.opensuse.org pings back, but does not respond to http or ftp connections.

It's not up to me to announce anything, but from where I'm sat, it appears to working again.

I noticed same issue yesterday, exactly during my KDE4.8 installation so I switched to one of the available opensuse mirrors: http://ftp5.gwdg.de/pub/opensuse/repositories/KDE:/Release:/48/openSUSE_12.1... And installation went completed :o) Cheers, -- Marco Calistri (amdturion) opensuse 12.1 (Aspargus) - Kernel 3.1.10-1.9-desktop x86_64 Gnome 3.2.1 Intel® Core™ i5-2410M CPU @ 2.30GHz × 4 - Intel® Sandybridge Mobile -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org