Fletcher,
I got a batch of Seagate 1 TB SATA drives (288) in DS4243s that do this on a somewhat regular basis. The log file showed they had spun down and it took them a while to spin back up when requested. These are on a NearStore so I don't worry much about the performance aspect. I also have a lot of spares so I just wait until the system fails them. If these are SAS drives on a primary filer I would expect the retries to cause latency issues. I would install the latest disk firmware bundle and see if it helps.
Jeff
On Sat, Aug 4, 2012 at 11:35 AM, Jeff Mother speedtoys.racing@gmail.com wrote:
Ontap manages that for you, and softly ore fails when specific thresholds are met.
Doesn't need user management.
Retries are normal.
Sent from my iPhone
On Aug 4, 2012, at 9:47 AM, Fletcher Cocquyt fcocquyt@stanford.edu wrote:
I ran a syslog search for "retry" on this 3270 head for the last 7 days to get these disk retry messages:
Aug 3 20:55:29 [na04:scsi.cmd.retrySuccess:debug]: Enclosure services device 3a.03.99: request successful after retry #1/#0: cdb 0x3c (1301).
then get a frequency count to find chronic retry disks.
awk '{print $12}' irt-na04.retry | sort | uniq -c | sort -nr 15 3a.06.99: 14 3a.05.99: 13 3a.03.99: 11 3a.04.99: 10 3a.02.99: 10 3a.01.99: 9 3c.00.99: 7 0a.08.99: 6 0a.07.99: 4 3a.08.99: 3 3a.07.99: 3 0b.00.99: 3 0a.05.99: 3 0a.03.99: 2 0a.06.99: 2 0a.04.99: 1 0a.02.99: 1 0a.01.99:
Q: what level of retries should we look at pre failing a disk and replacing it proactively? Will the retries cause performance issues if ignored?
thanks,
Fletcher
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