Public bug reported:
Binary package hint: linux-image-2.6.17-10-generic
I apologize for my very poor English.
Any device is /dev/sdb goes slowly and when it works the system is
unstable.
hdparm -tT /dev/sda /dev/sdb returns
/dev/sda:
Timing cached reads: 1516 MB in 2.00 seconds = 756.88 MB/sec
Timing buffered disk reads: 198 MB in 3.01 seconds = 65.70 MB/sec
/dev/sdb:
Timing cached reads: 1760 MB in 2.00 seconds = 878.71 MB/sec
Timing buffered disk reads: 6 MB in 3.59 seconds = 1.67 MB/sec
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Also whit new kernel 2.6.19 i have the some problem.
Instead with kernel 2.6.15 (Dapper's kernel on Edge) it works properly:
hdparm -t /dev/sdb
/dev/sdb:
Timing buffered disk reads: 178 MB in 3.00 seconds = 59.25 MB/sec
It's a Ubuntu bug and not a kernel bug because with other distribution
linux whit kernel > 2.6.17 (as an example knoppix 5.10) it works.
Controller SATA is:
01:07.0 Mass storage controller: ALi Corporation ALi M5281 Serial ATA / RAID
Host Controller (rev a1)
01:07.1 Mass storage controller: ALi Corporation M5228 ALi ATA/RAID Controller
(rev c6)
** Affects: linux-source-2.6.17 (Ubuntu)
Importance: Undecided
Status: Unconfirmed
--
sata_uli - second sata hard disk does not work properly.
https://launchpad.net/bugs/73236
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