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Root Volume space full due to RAID Parity Inconsistency large files

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ontap-9
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Applies to

  • ONTAP 9
  • AFF/FAS

Issue

Root volumes on nodes are filling up rapidly, following symptoms and log outputs are observed:

  • EMS/event log shows repeated RAID errors:

 NOTICE raid.tetris.cksum.embed: Invalid checksum entry on Disk /aggr0_Node_aggr_name/plex0/rg0/0n.5P3 Shelf 0 Bay 5 [NETAPP   X4019S172B15TNTE NA06] S/N [XXXX] UID [65593030:54601064:00253841:00000004:500A0981:00000003:00000000:00000000:00000000:00000000], block #XXX, during write operation.

 NOTICE raid.rg.readerr.repair.cksum.error: Data recalculated from parity on Disk /Node_aggr_name/plex0/rg0/0n.5P1 Shelf 0 Bay 5 [NETAPP X4019S172B15TNTE NA06] S/N [XXXX] UID [65593030:54601064:00253841:00000004:500A0981:00000001:00000000:00000000:00000000:00000000]; block #XXX does not match the stored and computed checksums.

 NOTICE raid.rg.readerr.repair.data: Fixing bad data on Disk /Node_aggr_name/plex0/rg0/0n.5P1 Shelf 0 Bay 5 [NETAPP   X4019S172B15TNTE NA06] S/N [XXXX] UID [65593030:54601064:00253841:00000004:500A0981:00000001:00000000:00000000:00000000:00000000], disk block (DBN) XXXX, aggregate block (VBN) XXXX.

  • Large files (15GB–19GB) named parity_inconsistencies* are present in /mroot/etc/raid:

::*> system shell -node <node_name> -command ls -la /mroot/etc/raid
-rw-r--r-- 1 root wheel 17471671295 parity_inconsistencies.4
-rw-r--r-- 1 root wheel 15993555755 parity_inconsistencies.0

  • Root volume utilization spikes to 98%, risking system stability.

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