Stopped gnome-disks format at 78% (~6 hours remaining).
Used #sudo dd if=/dev/zero of=/dev/sda1 bs=1M seek=1001250 status=progress, write speed is ~100 MB/s.
Thanks a ton!
witchergeraltofrivia
joined 1 year ago
Yes I am overwriting it with zeroes while formatting (using gnome-disks). I didn't know it did multiple overwrites, thought it did 1 pass overwrite with zeros.
Yup I am zeroing it.
That explains the declining speed. Thanks a lot for the insight!
Started with 50 MBps, went down to 20 MBps shortly after and is declining slowly since. Running for 7+ hours.
HDD is 5 years old, rare use but very well kept.
Edit: external 1.5 TB HDD connected over USB 3. Overwriting with zeroes while formatting using gnome-disks.
Update:
Stopped gnome-disks ~78% and continued writing zeros using dd for the remaining sectors.
command used: #sudo dd if=/dev/zero of=/dev/sda1 bs=1M seek=1001250 status=progress (don't copy without understanding), used seek here to skip already zeroed sectors.
write speed went up from ~14 MB/s to ~100 MB/s.
slow speed could be caused by multiple passes of overwrites by gnome-disks (not sure if it does that), or by "initializing the filesystem at the same time as zeroing" as mentioned by @ares35.
gradual speed decrement was observed in both methods, as mentioned by @Synthead.
Thanks to everyone for being so helpful.
which card do you mean? other similar performance cards are generally a bit more expesive, 7800xt is cheaper than 7900gre but performance goes down by similar margin, so both seem great value