The lvols are EXT4, and I see that barrier is enabled by-default. I can
try disabling, but need to investigate a bit.
Also, I believe I may have isolated the problem a bit. I can only cause
this behavior when I access these volumes from an NFS client.
I think this might be put it out of scope of the dm code.
-Charles
On 3/3/11 23:34 , Moger, Babu wrote:
I have looked at your logs.. Here are the messages..
Mar 3 15:38:37 rman-ss-03 kernel: sd 1:0:0:0: Done: SUCCESS
Mar 3 15:38:37 rman-ss-03 kernel: 2 sd 1:0:0:0:
Mar 3 15:38:37 rman-ss-03 kernel: command: Synchronize Cache(10): 35 00 00 00 00 00 00 00 00 00
Mar 3 15:38:37 rman-ss-03 kernel: : Current: sense key: Illegal Request
Mar 3 15:38:37 rman-ss-03 kernel:<<vendor>> ASC=0x94 ASCQ=0x1ASC=0x94 ASCQ=0x1
Mar 3 15:38:37 rman-ss-03 kernel:
Mar 3 15:38:38 rman-ss-03 kernel: sd 1:0:0:0: Done: SUCCESS
Mar 3 15:38:38 rman-ss-03 kernel: 2 sd 1:0:0:0:
Mar 3 15:38:38 rman-ss-03 kernel: command: Synchronize Cache(10): 35 00 00 00 00 00 00 00 00 00
Mar 3 15:38:38 rman-ss-03 kernel: : Current: sense key: Illegal Request
Mar 3 15:38:38 rman-ss-03 kernel:<<vendor>> ASC=0x94 ASCQ=0x1ASC=0x94 ASCQ=0x1
These messages are coming because of Synchronize Cache commands. It
may be related to type of filesystem you are on. Did you have barrier
enabled on your filesystem. I see that these commands are going out
to target on passive paths.. I dont understand that part yet.
Normally scsi device handlers block commands going out passive
paths..This should be coming in a differrent path.. I still have to
figure that out..
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