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NDMP DAR restores of single file failing with bad seek to offset error

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Category:
ndmp
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dp
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Applies to

  • ONTAP 9
  • Data ONTAP 8 7-Mode
  • NDMP DAR restore
  • NetVault

Issue

When restoring large NDMP backups and the requested file spans multiple tapes, the DAR restores go into a loop and failed with a bad seek to offset error.

  • Bad seek to offset error is seen on the Backup.gz.

Example:

rst Wed Apr 14 16:27:01 KST 2021 /vol/ndmptest/ Start (Level 0, NDMP)
rst Wed Apr 14 16:27:01 KST 2021 /vol/ndmptest/ Options (b=64, d, y, H)
rst Wed Apr 14 16:27:01 KST 2021 /vol/ndmptest/ Tape_open (ndmp)
rst Wed Apr 14 19:03:32 KST 2021 /vol/ndmptest/ Error (Bad seek to offset: 14015553116160)
rst Wed Apr 14 19:03:33 KST 2021 /vol/ndmptest/ Tape_close (ndmp)
rst Wed Apr 14 19:03:33 KST 2021 /vol/ndmptest/ Abort (17 files, 22065 MB)
 
  • Mover paused on EOF at offset and WINDOWS length invalid -- changing to INFINITY warnings are reported on NDMPD.gz

Example:

Wed Apr 14 2021 16:27:01 +09:00 [kern_ndmpd:info:4147] [33431] NOTICE: DIRECT ACCESS RECOVERY (DAR) requested
Wed Apr 14 2021 16:27:01 +09:00 [kern_ndmpd:info:4147] [33431] INFO: DATA: START RECOVER request: nlist size 1
Wed Apr 14 2021 16:27:01 +09:00 [kern_ndmpd:info:4147] [33431] INFO: DATA notification state 1 (SESS_STATE: LISTENING) event 10 (EVENT: STATE CHANGE)
Wed Apr 14 2021 16:27:01 +09:00 [kern_ndmpd:info:4147] [33431] INFO: MOVER: notification state 1 (SESS_STATE: LISTENING) event 10 (EVENT: STATE CHANGE)
Wed Apr 14 2021 16:27:01 +09:00 [kern_ndmpd:info:4147] [33431] INFO: DATA notification state 4 (SESS_STATE: ACTIVE) event 10 (EVENT: STATE CHANGE)
Wed Apr 14 2021 16:27:01 +09:00 [kern_ndmpd:info:4147] [33431] INFO: MOVER: notification state 4 (SESS_STATE: ACTIVE) event 10 (EVENT: STATE CHANGE)
Wed Apr 14 2021 18:20:02 +09:00 [kern_ndmpd:info:4147] [33431] INFO: DATA notification state 3 (SESS_STATE: PAUSED) event 8 (EVENT: SEEK)
Wed Apr 14 2021 18:25:22 +09:00 [kern_ndmpd:info:4147] [33431] INFO: MOVER: signaling EOF at 6754681946112 to 14015553077248 on SEEK FSR
Wed Apr 14 2021 18:25:22 +09:00 [kern_ndmpd:info:4147] [33431] INFO: MOVER pause on 'EOF' at offset 14015553077248
......
Wed Apr 14 2021 19:03:16 +09:00 [kern_ndmpd:info:4147] [33431] INFO: MOVER: signaling EOF at 0 to 14015553077248 on SEEK FSR
Wed Apr 14 2021 19:03:16 +09:00 [kern_ndmpd:info:4147] [33431] INFO: MOVER pause on 'EOF' at offset 14015553077248
Wed Apr 14 2021 19:03:25 +09:00 [kern_ndmpd:info:4147] [33431] WARN: MOVER: WINDOW length 6754681946112 (0x624b26b0000) invalid -- changing to INFINITY
Wed Apr 14 2021 19:03:25 +09:00 [kern_ndmpd:info:4147] [33431] INFO: MOVER: READ CONTINUE: L:-1 O:0 record 0
Wed Apr 14 2021 19:03:25 +09:00 [kern_ndmpd:info:4147] [33431] INFO: DATA notification state 3 (SESS_STATE: PAUSED) event 8 (EVENT: SEEK)
Wed Apr 14 2021 19:03:25 +09:00 [kern_ndmpd:info:4147] [33431] INFO: MOVER: notification state 3 (SESS_STATE: PAUSED) event 8 (EVENT: SEEK)
Wed Apr 14 2021 19:03:32 +09:00 [kern_ndmpd:info:4147] [33431] INFO: MOVER: received ABORT command

 

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