Hi!
First of all sorry if this is the wrong place to ask, if it is, please point me to a better suited channel!
Anyway I’ve got this old 2TB HDD attached to a rpi 4b, it worked flawlessly until now, the last few days it started disconnecting randomly…
If i reboot it mounts back again.
This is the df output:
/dev/sdb1 1.8T 535G 1.2T 31% /mnt/2tb
And this is sudo dmesg | grep sdb (the device is sdb ofc).
[ 14.970908] sd 1:0:0:0: [sdb] 3907029168 512-byte logical blocks: (2.00 TB/1.82 TiB)
[ 14.978857] sd 1:0:0:0: [sdb] 4096-byte physical blocks
[ 14.984484] sd 1:0:0:0: [sdb] Write Protect is off
[ 14.989382] sd 1:0:0:0: [sdb] Mode Sense: 43 00 00 00
[ 14.989684] sd 1:0:0:0: [sdb] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[ 15.044802] sd 1:0:0:0: [sdb] Preferred minimum I/O size 4096 bytes
[ 15.051196] sd 1:0:0:0: [sdb] Optimal transfer size 33553920 bytes not a multiple of preferred minimum block size (4096 bytes)
[ 15.065585] sdb: sdb1
[ 15.068403] sd 1:0:0:0: [sdb] Attached SCSI disk
[ 22.631983] EXT4-fs (sdb1): recovery complete
[ 22.660922] EXT4-fs (sdb1): mounted filesystem with ordered data mode. Quota mode: none.
The device has an external power supply of its own, so it’s not a power issue… This setup worked for a couple of years.
I cannot see anything wrong here, pheraps is the HDD which is going bad?
Very good answer. I’ve also spent some time analyzing some red herrings when it was something else like a bad cable or connector. And by the way, you can use the same keys in journalctl as in the usual pager (less(?)) so hit / and search for ‘unmount’, ‘disconnect’, etc. And then scroll through the log and find out what led to the situation.
