On Tue, 9 Jul 2013 15:33:29 -0600 Curtis <serverascode@xxxxxxxxx> wrote: > Hi All, > > I'm wondering what the best way to determine when a RAID0 has failed? > > We have some stateless servers that use a stripe/RAID0, but we'll need > to know if it failed so we can pull it out of the "cluster" and > rebuild it. It would be better to find out sooner than later that the > stripe has failed. > > I know from reading the man page that I can't use mdadm to monitor the > stripe. Is it basically just that the device becomes unusable in some > fashion? > How would you determine if a lone drive had failed? Presumably by error messages in the kernel logs, or similar. Use exactly the same mechanism to test if a RAID0 has failed. (A "RAID0" doesn't fail as whole. Bits of it might, other bits might keep working, just like a drive which can lose some sectors but other sectors keep working. Certainly a whole drive can fail if it's logic-board dies. Similarly a whole RAID0 can fail if the SATA/SCSI/USB controller dies.) NeilBrown
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