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PERC H755 write-back disable cache guard
Hi!
Everytime something happens to one of my many disks the machine is failing,
once rebooted it is booting with a warning and asking if i approve to lose my data,
now,
my data is not important, it's kafka and i have replications across other machines, is there a way to disable this and allow data loss on the controller configurations?
DELL-Joey C
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November 28th, 2023 03:57
Hi,
What server model are you using? Could you provide us the exact error message, a screenshot would be good. What OS is installed, and are you using OMSA?
If you are OK with data loss, I can suggest that you only need to access the PERC H755's configuration utility and delete the RAID array. You then can rebuild from new configuration.
Origin3k
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November 28th, 2023 07:14
The H755 is faced by a "timming" problen when it comes to ECC which ends up in the situation you described. There was a Dell Tech Advice some time ago about that issue. You sould upgrade to the latest FW for your H755 and after that the Server needs to be completly shutdown for one time. If not the changed timing settings isnt active.
Regards,
Joerg
RagingPuppies1
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November 28th, 2023 08:18
@DELL-Joey C
ubuntu 20.4.6
Dell R750
I want to use the write-back feature as it boosts my performance, i just don't want the machine to stop when a data disk is dead and to press D or X to allow data loss
RagingPuppies1
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November 28th, 2023 08:20
@Origin3k few months ago i had many failures with the H755, last month i upgraded the FW and it seems to stop, now i had an actual failure of one of the disks but the machine froze and forced me to type D to allow data deletion, only after that the machine was able to boot, i'm trying to find a way to let the machine continue working without that disk and without rebooting, the disk was not the OS disk, i have raid 5 for the OS and it seems ok, the disk was just one of a bunch of data disks.