Hi again,

Here is the extract of mdadm errors from system.log:

Sep 22 13:17:49 NAS mdadm[2171]: Fail event detected on md device /dev/md0, component device /dev/sdc1
Sep 22 13:17:50 NAS disk_event_handler[19813]: mdadm: set 8:34 faulty in /dev/md1
Sep 22 13:17:50 NAS mdadm[2171]: Fail event detected on md device /dev/md1, component device /dev/sdc2
Sep 22 13:18:00 NAS mdadm[2171]: NewArray event detected on md device /dev/md1
Sep 22 13:18:06 NAS mdadm[2171]: RebuildStarted event detected on md device /dev/md1, component device resync
Sep 22 13:18:58 NAS mdadm[2171]: RebuildFinished event detected on md device /dev/md1, component device resync
Sep 22 13:29:16 NAS disk_event_handler[31784]: mdadm: hot removed 8:33 from /dev/md0
Sep 22 13:29:16 NAS disk_event_handler[31784]: mdadm: hot removed 8:35 from /dev/md127
Sep 22 13:37:50 NAS mdadm[2119]: NewArray event detected on md device /dev/md0
Sep 22 13:37:51 NAS mdadm[2119]: DegradedArray event detected on md device /dev/md0
Sep 22 13:37:51 NAS mdadm[2119]: NewArray event detected on md device /dev/md1

Below are some items i thought would be relevant from the other logs, the main one being

[Fri Sep 22 13:36:22 2023] md/raid:md127: not enough operational devices (2/4 failed)

I guess my main question now is: is there still a way i can force a rebuild / should i try to remove/readd the faulty disk ?

Or is it just trying to reclaim data off the two valid disks and pray something is still readable ?

Many thanks for any insights...

DMESG [Fri Sep 22 13:36:18 2023] Buffer I/O error on dev sdd3, logical block 1, async page read —> 20 of these

[Fri Sep 22 13:50:34 2023] sd 3:0:0:0: [sdd] tag#13 Add. Sense: Unrecovered read error - auto reallocate failed

[Fri Sep 22 13:36:18 2023] blk_update_request: I/O error, dev sdd, sector 9437257

[Fri Sep 22 13:36:22 2023] md/raid:md127: device sda3 operational as raid disk 0

[Fri Sep 22 13:36:22 2023] md/raid:md127: device sdb3 operational as raid disk 1

[Fri Sep 22 13:36:22 2023] md/raid:md127: not enough operational devices (2/4 failed)

SYSTEM

Mostly « THROW: open failed path:/data/Pictures errno:2 (No such file or directory) » (and others errors related to my top folders being missing)

KERNEL

Lots of these:

Sep 22 13:44:07 NAS kernel: sd 3:0:0:0: [sdd] tag#15 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE

Sep 22 13:44:07 NAS kernel: sd 3:0:0:0: [sdd] tag#15 Sense Key : Medium Error [current] [descriptor]

Sep 22 13:44:07 NAS kernel: sd 3:0:0:0: [sdd] tag#15 Add. Sense: Unrecovered read error - auto reallocate failed

Sep 22 13:44:07 NAS kernel: sd 3:0:0:0: [sdd] tag#15 CDB: Read(10) 28 00 00 90 00 48 00 00 08 00

Sep 22 13:44:07 NAS kernel: blk_update_request: I/O error, dev sdd, sector 9437257

Sep 22 13:44:07 NAS kernel: Buffer I/O error on dev sdd3, logical block 1, async page read

SYSTEMD JOURNAL

Mostly « open failed » on the top folders

STATUS:

[23/07/22 20:40:07 CEST] warning:disk:LOGMSG_SMART_ATA_ERR_30DAYS_WARN Detected increasing ATA error count: [62418] on disk 1 (Internal) [WDC WD20EFRX-68EUZN0, WD-WCC4M6EZU2XC] 20733 times in the past 30 days. This condition often indicates an impending failure. Be prepared to replace this disk to maintain data

Forum Discussion

Starlink Router