Thomas Fjellstrom wrote:

On Tue October 13 2009, andy yan wrote:

quoted

I will send you a patch for debugging this issue, please help to try and
send back the log, thanks!

I will do whatever I can to help get this resolved :) I have some C skills, 
but no kernel/device driver experience, so at the very least I should be able 
to do builds and make small changes if needed, in addition to patching and 
endless reboots ;D

I'm also willing to help.
The card is not on a production server and the disks connected to the 
card do not contain any valuable data so I can make any test wanted.

When the problem occurs it seems the devices (disks) are hosed. Deleting 
them from the system (echo 1 > /sys/block/sdh/device/delete), removing 
the mvsas module (rmmod -f) and reloading it doesn't work. The card 
seems correctly initialised after reloading the module, it correctly 
responds to commands (in /sys/class/sas_phy/ and sas_ports, I can reset 
ports/phys, I can ask for a rescan of disks). But the disks themselves 
do not seem to answer to the scan and are not detected, all I get is :

Oct 13 15:17:33 almery kernel: [29162.468218] sas: sas_ata_phy_reset: 
Found ATA device.
Oct 13 15:17:33 almery kernel: [29162.470279] ata19.00: both IDENTIFYs 
aborted, assuming NODEV
Oct 13 15:17:33 almery kernel: [29162.470321] sas: sas_ata_phy_reset: 
Found ATA device.
Oct 13 15:17:33 almery kernel: [29162.472391] ata19.00: both IDENTIFYs 
aborted, assuming NODEV
Oct 13 15:17:33 almery kernel: [29162.472433] sas: sas_ata_phy_reset: 
Found ATA device.
Oct 13 15:17:33 almery kernel: [29162.474492] ata19.00: both IDENTIFYs 
aborted, assuming NODEV
Oct 13 15:17:33 almery kernel: [29162.474533] ata19.00: disabled
Oct 13 15:17:33 almery kernel: [29162.474572] sas: sas_ata_phy_reset: 
Found ATA device.
Oct 13 15:17:33 almery kernel: [29162.474627] scsi_alloc_sdev: 
Allocation failure during SCSI scanning, some SCSI devices might not be 
configured
 
 

Is there a way to get a disk to reinitialize itself without a reboot ?

Drives are SAMSUNG HD501LJ
Linux almery 2.6.31.1-vs2.3.0.36.14 #7 SMP Mon Oct 12 12:58:07 CEST 2009 
x86_64 GNU/Linux
with or withous vserver patch applied : same problem, kernel not tainted.

The problem occurs also when the disks are not in an md array.

Christian Vilhelm.

-- 
/~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\
|       Christian Vilhelm : christian.vilhelm@univ-lille2.fr         |
|            Reality is for people who lack imagination              |
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