Disk Arrays
cancel
Showing results for 
Search instead for 
Did you mean: 

autoraid 12H: 'not enough drives'

Erik Heckers
Advisor

autoraid 12H: 'not enough drives'

Hello!

Removed some disks from an old
Autoraid and want to use it with 10 instead
of 12 disks. Now it get that error message.
I checked all the array* commands but
didn't find a solution (e.g.array formatting didn't help)

Any hints?

Thank You,
Erik.
if power_on; then
11 REPLIES
A. Clay Stephenson
Acclaimed Contributor

Re: autoraid 12H: 'not enough drives'

You should be able to run with only 4 drives so 10 should be no problem.


I would reduce it to 4 drives, remove all Logical Drives and Format the array (using the front panel). Next, add a disk at a time until you reach 10.


Note: You can't format until all the Logical Drives have been deleted.
If it ain't broke, I can fix that.
Michael Steele_2
Honored Contributor

Re: autoraid 12H: 'not enough drives'

insf -e -or- reboot server.

Check the zoning on the brocade switch.

eliminate the brocade and direct connect.

'armdsp -a (* report all luns *)

armdsp -R (* restart server *)
Support Fatherhood - Stop Family Law
Patrick Wallek
Honored Contributor

Re: autoraid 12H: 'not enough drives'

Just an FYI for you Frederic, the AutoRaid 12H is a SCSI attached unit, so zoning and switches and any other Fibre connectivity issues will NOT be an issue here.
Michael Steele_2
Honored Contributor

Re: autoraid 12H: 'not enough drives'

Thanks!
Support Fatherhood - Stop Family Law
Steve Labar
Valued Contributor

Re: autoraid 12H: 'not enough drives'

Your error could be related to loss of data redundancy. Did you remove and LUNs before you removed the disks? The RAID, may think it is still supporting all of the previously configured LUNs with less disk space available. Remove some of you LUNs until required space is at or below available space you have now and see if that helps.

Good Luck.

Steve
Eugeny Brychkov
Honored Contributor

Re: autoraid 12H: 'not enough drives'

Erik,
you can not remove more than one disk at a time until rebuild will complete. Removing/failing more than one disk will lead disk array to 'data loss' state. Try reformatting it from the front panel. Look to anothers' advices. If nothing will help try removing batteries from both controllers (each controller has 2 batteries) to clear maps, then insert batteries back and try formatting disk array again
Eugeny
PS. It is not a good way how you did. Removing disks one-by-one from 'live' disk array and waiting for rebuild to complete would save your data
A. Clay Stephenson
Acclaimed Contributor

Re: autoraid 12H: 'not enough drives'

Since he tried formatting, I assumed that he doesn't care about the data. Again, I would reduce this to as small a problem as possible (so that we run less risk of more bad drives) - 4 drives. Remove all logical drives (using front panel) and format (using front panel). I done this many times and it always works. You next add 1 drive at a time and you will probably have to use the 'Include Drive' front-panel command each time.
If it ain't broke, I can fix that.
Vincent Farrugia
Honored Contributor

Re: autoraid 12H: 'not enough drives'

Hello,

That is a worry, in my opinion.

When you create a LUN in an AutoRAID, ALL the disks are spanned across. So if you suddenly remove 2 disks without letting the AutoRAID to rebuild the data onto th remaining disks, you have data loss, plain simple.

How did you remove the disks? You should have removed ONE disk at a time, each time waiting for the AutoRAID to rebuild its data.

Also, are you sure that your current data could be held in 10 disks? It could be that you ran out of space when trying to rebuild.

I hope you have a good backup.

HTH,
Vince
Tape Drives RULE!!!
Erik Heckers
Advisor

Re: autoraid 12H: 'not enough drives'

Hello!

To clarify things:

I first deleted all LUNS.
(no LUNS= no data?)

I removed one disk (no problem).

The other disks I 'downed' using
arraycfg -D -d -Z

And now I'm stuck ...

Thanks for your help,
I may try the hard way and
removing the batteries.
But I still hope I can do it
via command-line...
if power_on; then
Erik Heckers
Advisor

Re: autoraid 12H: 'not enough drives'

Hello!

Problem solved (after one night of sleep ...)

After arrayfmt I checked the status again
today (arraydsp )
and saw the line
'Used by non-included disks <=100%>'.

All disks have been 'excluded' automatically
(by formatting?) and therefore it
reported 'not enough drives'.

Problem solved by simply including
all disks again.

Erik.

if power_on; then
Bill McNAMARA_1
Honored Contributor

Re: autoraid 12H: 'not enough drives'

yea, as mentioned you need 4 drives minimum! I used to use this as a test question in autoraid certification courses I gave! Always a winner question!

Note about Auto Include, if you include a drive with luns configured and it gets auto included or if auto include is off and you manually include, then expect the autoraid to spend a lot of time balancing data across the extra drive. I'd recommend keeping Auto Include Off (like you have)!

Later,
Bill
It works for me (tm)