Checksum errors only on P1 disk partitions

• Newly installed system or system powered off for extended period of time
• When newly created data aggregates are created background aggregate scrub detects checksum errors only on P1 partitions

[Node-01: config_thread: raid.rg.scrub.summary.cksum:notice]: Scrub found 4487670 checksum errors in /Aggr_1/plex0/rg0, 2151414 in current scrub.
[Node-01: config_thread: callhome.dsk.scrub:alert]: Call home for DISK SCRUB CHECKSUM ERROR

[Node-01: raidio_thread: raid_rg_scrub_cksum_bno_1:notice]: params: {'disk_rpm': 'N/A', 'serialno': 'XXXXXXXXXXXXXX', 'disk_type': '13', 'stored_vbn': '1852237202', 'firmware_revision': 'NA50', 'expected_dbn': '1743378', 'disk_info': 'Disk /NAggr_1/plex0/rg0/0n.0P1 Shelf 0 Bay 0 [NETAPP   X4010WBORA1T9NTE NA50] S/N [XXXXXXXXXXXXXX] UID [6014EE83:0A9BF480:500A0981:00000001:00000000:00000000:00000000:00000000:00000000:00000000]', 'site': 'Local', 'stored_dbn': '1748626', 'bay': '0', 'carrier': '', 'shelf': '0', 'owner': '', 'vendor': 'NETAPP  ', 'model': 'X4010WBORA1T9NTE', 'expected_vbn': '1852237202'}

[Node-01: raidio_thread: raid_multierr_cksum_bno_1:notice]: params: {'disk_rpm': 'N/A', 'serialno': 'XXXXXXXXXXXXXX', 'disk_type': '13', 'stored_vbn': '1852237231', 'firmware_revision': 'NA50', 'expected_dbn': '1743407', 'disk_info': 'Disk /NAggr_1/plex0/rg0/0n.0P1 Shelf 0 Bay 0 [NETAPP   X4010WBORA1T9NTE NA50] S/N [XXXXXXXXXXXXXX] UID [6014EE83:0A9BF480:500A0981:00000001:00000000:00000000:00000000:00000000:00000000:00000000]', 'site': 'Local', 'stored_dbn': '1748655', 'bay': '0', 'carrier': '', 'shelf': '0', 'owner': '', 'vendor': 'NETAPP  ', 'model': 'X4010WBORA1T9NTE', 'expected_vbn': '1852237231'}
 

• Excessive errors cause adapter to go offline

[Node-01: disk_admin: disk.checksum.offlineAdapter:alert]: Adapter 0n taken offline due to checksum verification failure on multiple disks. Keep the adapter offline and contact Contact NetApp technical support. for assistance.
[Node-01: disk_admin: callhome.hba.failed:EMERGENCY]: Call home for Write Verification Error: Port 0n Failed. Keep the adapter offline and contact NetApp technical support for assistance.

• Scrub is fixing the checksums

[Node-01: raidio_thread: raid_mirror_readerr_rewrite_1:debug]: params: {'owner': '', 'rg': '/Aggr1/plex0/rg0', 'blockNum': '528384'}

• Later scrubs show clean raids

[Node-01: config_thread: raid.rg.scrub.summary.cksum:notice]: Scrub found 0 checksum errors in /Aggr1/plex0/rg0.