Why does a drive show as prefailed in Data ONTAP

Last updated
Save as PDF
Share
1. Share
2. Tweet
3. Share

Views:: 5,561

Visibility:: Public

Votes:: 3

Category:: disk-drives

Specialty:: HW

Last Updated:

Applies to

ONTAP
FAS Systems
AFF Systems

Issue

The output of sysconfig -r shows a drive in prefail status:

    RAID group /aggr1/plex0/rg0 (normal, block checksums)

      RAID Disk	Device  	HA  SHELF BAY CHAN Pool Type  RPM  Used (MB/blks)    Phys (MB/blks)
      ---------	------  	------------- ---- ---- ---- ----- --------------    --------------
      dparity 	0c.51.17	0c    51  17  SA:A   0  BSAS  7200 2538546/5198943744 2543634/5209362816 
      parity  	0c.52.18	0c    52  18  SA:A   0  BSAS  7200 2538546/5198943744 2543634/5209362816 
      data    	0c.50.18	0c    50  18  SA:A   0  BSAS  7200 2538546/5198943744 2543634/5209362816 
      data    	0c.53.18	0c    53  18  SA:A   0  BSAS  7200 2538546/5198943744 2543634/5209362816 
      data    	0c.51.18	0c    51  18  SA:A   0  BSAS  7200 2538546/5198943744 2543634/5209362816 
      data    	0b.57.23	0b    57  23  SA:B   0  FSAS  7200 2538546/5198943744 3815447/7814037168 
      data    	0c.50.19	0c    50  19  SA:A   0  BSAS  7200 2538546/5198943744 2543634/5209362816 
      data    	0c.53.19	0c    53  19  SA:A   0  BSAS  7200 2538546/5198943744 2543634/5209362816 (prefail)
      data    	0c.51.19	0c    51  19  SA:A   0  BSAS  7200 2538546/5198943744 2543634/5209362816 
      data    	0c.52.19	0c    52  19  SA:A   0  BSAS  7200 2538546/5198943744 2543634/5209362816 
      data    	0c.50.20	0c    50  20  SA:A   0  BSAS  7200 2538546/5198943744 2543634/5209362816

EMS message example of ONTAP determining a drive should be failed and marks it prefailed

Tue Dec 10 10:39:00 CET [node02: raidio_thread: raid.disk.predictiveFailure:error]: Disk /aggr01/plex1/rg1/3c.63.14 Shelf 63 Bay 14 [NETAPP X425_HCBEP1T2A10 NA02] S/N [XXXXXXX] UID [5000CCA0:XXXXXXX:00000000:00000000:00000000:00000000:00000000:00000000:00000000:00000000] reported a predictive failure and it is prefailed; it will be copied to a spare and failed