topic Re: Replace 2 failure disks with spare disks in the filer need your advise in ONTAP Discussions

Replace 2 failure disks with spare disks in the filer need your advise

HENRYPAN2 — Thu, 05 Jun 2025 06:35:05 GMT

Good Morning NetApp Gurus,

One of my old filer is billy up with 2 disks failure in the same time within in the same RAID 4 Group which knock my application offline.

The filer did have spare disks stand by.

Would you be kind enough to share your expertere to suggest a procedure to replace those 2 disks & bring my app back online?

Thanks in advance & looking forward to hear from you soon.

Henry

Re: Replace 2 failure disks with spare disks in the filer need your advise

maske — Sun, 12 Feb 2012 02:44:09 GMT

If you do a sysconfig -r are the disks in the aggr rebuilding/reconstructing with the spares?

If so let the reconstruction finish and make sure the aggr is back online with aggr status before pulling the other disks for replacement.

Re: Replace 2 failure disks with spare disks in the filer need your advise

arunchak — Sun, 12 Feb 2012 03:02:41 GMT

HI,

to add to that, you can replace the disk using "disk replace command"

stqa-3170-1> dsk replace ?

replace {start [-f] [-m] <disk_name> <spare_disk_name>} | {stop <disk_name>} - replace a file system disk with a spare disk or stop replacing

Thanks,

Arun

Re: Replace 2 failure disks with spare disks in the filer need your advise

HENRYPAN2 — Sun, 12 Feb 2012 03:05:30 GMT

Good Evening Doug,

The sysconfig -r show the aggr rebuilding/reconstructing is in stall status due to the 2nd disk within the same raid group fail immediately which kill the 1st reconstructing process.

This is a RAID 4 AGGR with only 5 disks in the raid group. With 2 out of 5 disk failure at the some time. I don't think that I'll be able to rebuild the AGGR :<(

Thanks for your kindly response.

Henry

Re: Replace 2 failure disks with spare disks in the filer need your advise

HENRYPAN2 — Sun, 12 Feb 2012 03:10:53 GMT

Thanks Arun!

Another easy way will be just destroy the old AGGR, then recreate a new one instead:>)

Cheers

Henry

Re: Replace 2 failure disks with spare disks in the filer need your advise

arunchak — Sun, 12 Feb 2012 03:19:51 GMT

Ha ha

right, that option will always be there...

And correct, with 2 disk failures in RAID4 you will not be able to rebuild . If you had some critical data then I think you should contact NetApp support, they might be able to help you retrieve it if you are lucky

Thanks,

Arun

Re: Replace 2 failure disks with spare disks in the filer need your advise

HENRYPAN2 — Sun, 12 Feb 2012 03:23:20 GMT

Salute to Arun for the correct answer!

Cheers

Henry