Navisphere disk commands

Question

Hi,
Quick question - I'm in the middle of testing the installationof several cx-380s, and part of this is recovery from a failed disk. Now the ones here I can manually go pull a disk out, but we've got some at remote sites too - was wondering if there was commandline/gui way of marking a disk as failed, to simulate a real failure?

TIA

Gary

lincoln2 · Answer

Not sure if this will accomplish your objective but you can proactively hot spare a disk drive via the UI or a Secure CLI command. This causes Flare to copy the contents of the drive to a hot spare and then mark the drive as faulted. You would then have to remove and re-insert the 'faulted' drive to have the data copied back.

Allen Ward · Answer

*lol* Since this is a remote site for him and he doesn't have anyone to pull the drive in the first place, this might not be the best solution.

Mind you, I don't have a better answer other than "Road Trip"!!!

sanation99 · Answer

found the command to switch a drive off :-Navicli ¿h cru_on_off ¿'engineering password' 0_0_4 state Where 0_0_4 - slot 4 of bus 0 enclosure 0 State - 0 ¿ power off 1 ¿ Power on

kelleg · Answer

The cur_on_off command is an engineering command and can be VERY dangerous to use - use at your own risk! It is not intending for testing.regards,glen kelley

sanation99 · Answer

I'll bear it in mind Have trie dit today an don eting I noticed, when I failed a disk, the hot spar edidn't kick in, is this normal ? ( we're on falre 24 and 8 disk raid 10 groups)

nandas · Answer

To me this is normal, as you have administratively powered down the disk - it is not a disk failure - so Hot spare will not be kicked in.

Any different ideas?
Thanks,
Sandip

Note - that's why this command is so dangerous and not to be used at field.

Message was edited by: added note. Sandip

kelleg · Answer

Raid 10 is stripped mirror, when a disk fails the mirror takes over. On a Raid 5 (parity) when a disk fails, the hot spare kicks in.

When you use the cur_on_off, you turn off the disk in the SP side that you sent the command to.

Issue:

navicli -h IP_address_SPx getdisk X_X_X -state

This will tell you the state of the disk on the SPx side.

regards,

glen kelley

kelleg · Answer

Just a follow up.If want the hot spare to kick in, you need to issue the cru_on_off to both SPA and SPB. Use a Raid 5 LUN to test against and remember the caution about using this command.regards,glen

dynamox · Answer

good stuff Glen ..thank you for sharing. We like to generate our own reports on disk failure, so this will be good to test our scripts in the future

CLARiiON

Navisphere disk commands

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