Apologies for the lack of clarity.
On 1/19/19 1:48 AM, Mikael Abrahamsson wrote:
On Fri, 18 Jan 2019, Basil Mohamed Gohar wrote:
Now when I view these drives they appear empty without any partitions
or filesystem information.
View how?
Tools like gparted, the Gnome Disks application, etc., show no
partitions on the drive. mdadm does not recognize them anymore as part
of an md device, testdisk does not find anything close to what appears
as a partition (though I imagine being part of an md device may make
this somewhat less surprising for testdisk).
Attempting to read the raw contents of the drives, e.g., with pv,
leads to the command failing immediately.
Fail how?
# pv --wait /dev/sde >
/run/media/basilgohar/4X4RAID0/24GBRAID-backup/wd-red-sde.img
pv: /dev/sde: read failed: Input/output error
After this, then dmesg logs its errors as well about sector 0 or sector
8 from my first message.
If you just get read errors from the drives, they (controller+drive)
might need power cycle to start working again. I have seen these kinds
of problems occur because of transient issues involving cables or one
drive misbehaving and taking both drives on the same controller
"channel" with it, etc.
This has been the case after multiple system starts/stops now over the
past few days.
