[opensuse] using a caddy on dvd port
Hello, I buy a second ssd, to put it in a caddy using the unuseful dvd port of my ASUS laptop. Works, but I noticed that hdparm -t gives /dev/sda: Timing buffered disk reads: 812 MB in 3.00 seconds = 270.55 MB/sec linux-owxt:/home/jdd # hdparm -t /dev/sdb /dev/sdb: Timing buffered disk reads: 1590 MB in 3.00 seconds = 529.88 MB/sec [ 3.153819] ata3: SATA link up 3.0 Gbps (SStatus 123 SControl 300) [ 3.154594] ata5: SATA link up 6.0 Gbps (SStatus 133 SControl 300) so looks like the caddy is half the speed of the usual sata port any idea why and is it somewhere configurable? the two ssd are said to be fully 6 Gbps capable thanks jdd -- http://dodin.org -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
* jdd@dodin.org <jdd@dodin.org> [11-14-18 14:20]:
Hello,
I buy a second ssd, to put it in a caddy using the unuseful dvd port of my ASUS laptop.
Works, but I noticed that hdparm -t gives
/dev/sda: Timing buffered disk reads: 812 MB in 3.00 seconds = 270.55 MB/sec linux-owxt:/home/jdd # hdparm -t /dev/sdb
/dev/sdb: Timing buffered disk reads: 1590 MB in 3.00 seconds = 529.88 MB/sec
[ 3.153819] ata3: SATA link up 3.0 Gbps (SStatus 123 SControl 300) [ 3.154594] ata5: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
so looks like the caddy is half the speed of the usual sata port
any idea why and is it somewhere configurable? the two ssd are said to be fully 6 Gbps capable
just guessing but dvd reads are slow compared to rust or solid state drives and the caddy mfgr doesn't support connecting above sata1, 300mps -- (paka)Patrick Shanahan Plainfield, Indiana, USA @ptilopteri http://en.opensuse.org openSUSE Community Member facebook/ptilopteri Registered Linux User #207535 @ http://linuxcounter.net Photos: http://wahoo.no-ip.org/piwigo paka @ IRCnet freenode -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
Le 14/11/2018 à 21:30, Patrick Shanahan a écrit :
* jdd@dodin.org <jdd@dodin.org> [11-14-18 14:20]:
[ 3.153819] ata3: SATA link up 3.0 Gbps (SStatus 123 SControl 300) [ 3.154594] ata5: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
just guessing but dvd reads are slow compared to rust or solid state drives and the caddy mfgr doesn't support connecting above sata1, 300mps
actually 3.0 Gbps but interfaces seems to be the same: [ 2.844380] ata3: SATA max UDMA/133 abar m2048@0xf7a1a000 port 0xf7a1a200 irq 32 [ 2.844382] ata5: SATA max UDMA/133 abar m2048@0xf7a1a000 port 0xf7a1a300 irq 32 is there a logical way to fix the speed or is it purely mechanical? (the caddy itself is given for 6 Gbps thanks jdd -- http://dodin.org -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
* jdd@dodin.org <jdd@dodin.org> [11-14-18 17:08]:
Le 14/11/2018 à 21:30, Patrick Shanahan a écrit :
* jdd@dodin.org <jdd@dodin.org> [11-14-18 14:20]:
[ 3.153819] ata3: SATA link up 3.0 Gbps (SStatus 123 SControl 300) [ 3.154594] ata5: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
just guessing but dvd reads are slow compared to rust or solid state drives and the caddy mfgr doesn't support connecting above sata1, 300mps
actually 3.0 Gbps
but interfaces seems to be the same:
[ 2.844380] ata3: SATA max UDMA/133 abar m2048@0xf7a1a000 port 0xf7a1a200 irq 32
[ 2.844382] ata5: SATA max UDMA/133 abar m2048@0xf7a1a000 port 0xf7a1a300 irq 32
is there a logical way to fix the speed or is it purely mechanical? (the caddy itself is given for 6 Gbps
you might try with hdparm -- (paka)Patrick Shanahan Plainfield, Indiana, USA @ptilopteri http://en.opensuse.org openSUSE Community Member facebook/ptilopteri Registered Linux User #207535 @ http://linuxcounter.net Photos: http://wahoo.no-ip.org/piwigo paka @ IRCnet freenode -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
Le 15/11/2018 à 04:57, Patrick Shanahan a écrit :
you might try with hdparm
I don't see how :-( I wont try anything dangerous. I use the new disk for Leap 15.0 I'm opn the way to configure for my needs while continuing working on 42.3 I will simply exchange the two disks when I begin to use 15.0 fully thanks jdd -- http://dodin.org -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
On 14/11/2018 23.07, jdd@dodin.org wrote:
Le 14/11/2018 à 21:30, Patrick Shanahan a écrit :
* jdd@dodin.org <> [11-14-18 14:20]:
[ 3.153819] ata3: SATA link up 3.0 Gbps (SStatus 123 SControl 300) [ 3.154594] ata5: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
just guessing but dvd reads are slow compared to rust or solid state drives and the caddy mfgr doesn't support connecting above sata1, 300mps
actually 3.0 Gbps
3 Gbps is about 300 MBps :-) Yes, I know that one byte is 8 bits, not ten, but there is some overhead on serial buses and often the 10 bit ratio better matches results.
but interfaces seems to be the same:
[ 2.844380] ata3: SATA max UDMA/133 abar m2048@0xf7a1a000 port 0xf7a1a200 irq 32
[ 2.844382] ata5: SATA max UDMA/133 abar m2048@0xf7a1a000 port 0xf7a1a300 irq 32
is there a logical way to fix the speed or is it purely mechanical? (the caddy itself is given for 6 Gbps
hdparm was used in the past to adjust these things, the -X parameters I think. I'm not sure it applies to SATA. The speed of the bus is, I think, a motherboard characteristic, and it is possible that if there is an interface dedicated to the DVD it has slower ratings to save some cost. -- Cheers / Saludos, Carlos E. R. (from 42.3 x86_64 "Malachite" at Telcontar)
participants (3)
-
Carlos E. R. -
jdd＠dodin.org -
Patrick Shanahan