This server configured Dell R730 with HBA 330 card HDD are configured write
through mode.
________________________________
From: David C. <[email protected]>
Sent: Wednesday, November 8, 2023 10:14
To: Peter <[email protected]>
Cc: [email protected] <[email protected]>
Subject: Re: [ceph-users] HDD cache
Without (raid/jbod) controller ?
Le mer. 8 nov. 2023 à 18:36, Peter
<[email protected]<mailto:[email protected]>> a écrit :
Hi All,
I note that HDD cluster commit delay improves after i turn off HDD cache.
However, i also note that not all HDDs are able to turn off the cache. special
I found that two HDD with same model number, one can turn off, anther doesn't.
i guess i have my system config or something different setting with two HDDs.
Below is my command to turn off the HDD cache.
root@lahost008:~# sdparm --set WCE=0 /dev/sdb
/dev/sdb: ATA ST10000NE000-3AP EN01
root@lahost008:~# cat /sys/block/sdb/queue/write_cache
write through
I also tried sdparm to run "sdparm --set WCE=0 /dev/sdb" I got the same result.
Anyone experienced this can advise?
Thanks a lot
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