This server configured Dell R730 with HBA 330 card HDD are configured write through mode. ________________________________ From: David C. <david.casier@xxxxxxxx> Sent: Wednesday, November 8, 2023 10:14 To: Peter <petersun@xxxxxxxxxxxx> Cc: ceph-users@xxxxxxx <ceph-users@xxxxxxx> Subject: Re: HDD cache Without (raid/jbod) controller ? Le mer. 8 nov. 2023 à 18:36, Peter <petersun@xxxxxxxxxxxx<mailto:petersun@xxxxxxxxxxxx>> 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 _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx<mailto:ceph-users@xxxxxxx> To unsubscribe send an email to ceph-users-leave@xxxxxxx<mailto:ceph-users-leave@xxxxxxx> _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
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