Garbage Collection failing at "got unknown magic number"

[cycloxr]

Hello,

I am running Proxmox Backup Server 3.0-2 which has been failing on the nightly Garbage Collect at 68% which the following error:

2023-09-05T16:01:58-04:00: TASK ERROR: can't read index '/mnt/datastore/Backups/portsmouth/vm/113/2023-06-21T04:00:02Z/drive-scsi0.img.fidx' - got unknown magic number

Any suggestions on where to go from here?

The following is the full job log:

2023-09-05T15:45:56-04:00: starting garbage collection on store Portsmouth
2023-09-05T15:45:56-04:00: Start GC phase1 (mark used chunks)
2023-09-05T15:51:43-04:00: marked 1% (3 of 295 index files)
2023-09-05T15:53:53-04:00: marked 2% (6 of 295 index files)
2023-09-05T15:55:30-04:00: marked 3% (9 of 295 index files)
2023-09-05T15:56:33-04:00: marked 4% (12 of 295 index files)
2023-09-05T15:57:13-04:00: marked 5% (15 of 295 index files)
2023-09-05T15:57:56-04:00: marked 6% (18 of 295 index files)
2023-09-05T15:58:02-04:00: marked 7% (21 of 295 index files)
2023-09-05T15:58:05-04:00: marked 8% (24 of 295 index files)
2023-09-05T15:58:07-04:00: marked 9% (27 of 295 index files)
2023-09-05T15:58:26-04:00: marked 10% (30 of 295 index files)
2023-09-05T15:58:34-04:00: marked 11% (33 of 295 index files)
2023-09-05T15:58:36-04:00: marked 12% (36 of 295 index files)
2023-09-05T15:58:38-04:00: marked 13% (39 of 295 index files)
2023-09-05T15:58:56-04:00: marked 14% (42 of 295 index files)
2023-09-05T15:59:12-04:00: marked 15% (45 of 295 index files)
2023-09-05T15:59:12-04:00: marked 16% (48 of 295 index files)
2023-09-05T15:59:13-04:00: marked 17% (51 of 295 index files)
2023-09-05T15:59:14-04:00: marked 18% (54 of 295 index files)
2023-09-05T15:59:14-04:00: marked 19% (57 of 295 index files)
2023-09-05T15:59:29-04:00: marked 20% (59 of 295 index files)
2023-09-05T15:59:42-04:00: marked 21% (62 of 295 index files)
2023-09-05T15:59:52-04:00: marked 22% (65 of 295 index files)
2023-09-05T15:59:59-04:00: marked 23% (68 of 295 index files)
2023-09-05T16:00:06-04:00: marked 24% (71 of 295 index files)
2023-09-05T16:00:26-04:00: marked 25% (74 of 295 index files)
2023-09-05T16:00:29-04:00: marked 26% (77 of 295 index files)
2023-09-05T16:00:35-04:00: marked 27% (80 of 295 index files)
2023-09-05T16:00:39-04:00: marked 28% (83 of 295 index files)
2023-09-05T16:00:42-04:00: marked 29% (86 of 295 index files)
2023-09-05T16:00:48-04:00: marked 30% (89 of 295 index files)
2023-09-05T16:00:52-04:00: marked 31% (92 of 295 index files)
2023-09-05T16:00:56-04:00: marked 32% (95 of 295 index files)
2023-09-05T16:00:58-04:00: marked 33% (98 of 295 index files)
2023-09-05T16:01:00-04:00: marked 34% (101 of 295 index files)
2023-09-05T16:01:07-04:00: marked 35% (104 of 295 index files)
2023-09-05T16:01:09-04:00: marked 36% (107 of 295 index files)
2023-09-05T16:01:11-04:00: marked 37% (110 of 295 index files)
2023-09-05T16:01:13-04:00: marked 38% (113 of 295 index files)
2023-09-05T16:01:16-04:00: marked 39% (116 of 295 index files)
2023-09-05T16:01:22-04:00: marked 40% (118 of 295 index files)
2023-09-05T16:01:26-04:00: marked 41% (121 of 295 index files)
2023-09-05T16:01:26-04:00: marked 42% (124 of 295 index files)
2023-09-05T16:01:27-04:00: marked 43% (127 of 295 index files)
2023-09-05T16:01:27-04:00: marked 44% (130 of 295 index files)
2023-09-05T16:01:28-04:00: marked 45% (133 of 295 index files)
2023-09-05T16:01:29-04:00: marked 46% (136 of 295 index files)
2023-09-05T16:01:31-04:00: marked 47% (139 of 295 index files)
2023-09-05T16:01:32-04:00: marked 48% (142 of 295 index files)
2023-09-05T16:01:33-04:00: marked 49% (145 of 295 index files)
2023-09-05T16:01:33-04:00: marked 50% (148 of 295 index files)
2023-09-05T16:01:34-04:00: marked 51% (151 of 295 index files)
2023-09-05T16:01:35-04:00: marked 52% (154 of 295 index files)
2023-09-05T16:01:36-04:00: marked 53% (157 of 295 index files)
2023-09-05T16:01:37-04:00: marked 54% (160 of 295 index files)
2023-09-05T16:01:37-04:00: marked 55% (163 of 295 index files)
2023-09-05T16:01:38-04:00: marked 56% (166 of 295 index files)
2023-09-05T16:01:38-04:00: marked 57% (169 of 295 index files)
2023-09-05T16:01:41-04:00: marked 58% (172 of 295 index files)
2023-09-05T16:01:43-04:00: marked 59% (175 of 295 index files)
2023-09-05T16:01:44-04:00: marked 60% (177 of 295 index files)
2023-09-05T16:01:45-04:00: marked 61% (180 of 295 index files)
2023-09-05T16:01:47-04:00: marked 62% (183 of 295 index files)
2023-09-05T16:01:48-04:00: marked 63% (186 of 295 index files)
2023-09-05T16:01:51-04:00: marked 64% (189 of 295 index files)
2023-09-05T16:01:52-04:00: marked 65% (192 of 295 index files)
2023-09-05T16:01:54-04:00: marked 66% (195 of 295 index files)
2023-09-05T16:01:55-04:00: marked 67% (198 of 295 index files)
2023-09-05T16:01:57-04:00: marked 68% (201 of 295 index files)
2023-09-05T16:01:58-04:00: TASK ERROR: can't read index '/mnt/datastore/Backups/portsmouth/vm/113/2023-06-21T04:00:02Z/drive-scsi0.img.fidx' - got unknown magic number

 

[ggoller]

Hi,
could you try verifying your backup and paste the result? To verify this group you can select your datastore, go to "content", then click the "V" besides the "vm/113" group. This way we can find out if the backup is intact.
More info here: https://pbs.proxmox.com/docs/maintenance.html#verification

 

[cycloxr]

Thanks, turns out vm/113 was no longer being used. I was able to remove the backups and the collections job ran successfully.