Hi James,
the following does not need new firmware (it is thus not an answer to your
question), and could be done for each of your 8TB drives:
1) put only one of the old drives (to be called /dev/sdb below), and a new
(8TB) drive (e.g. /dev/sdc), into some machine
2) figure out how much you can copy in <28 minutes with dd. Maybe bs=1M
count=300000 would work , assuming the drive can read/write 200MB/sec - if not
modify bs (which should ideally be a divider of the disk size). bs=1M
count=300000 would be 300GB .
3) copy sdb fully but piecewise to sdc:
- copy 300GB with a single dd command like dd if=/dev/sdb of=/dev/sdc
- wait a few seconds until the new drive (sdc) has emptied its cache; better:
sync
- cycle power of the old drive (better to have it on its own SATA controller,
but that might not matter)
- copy the exact next 300GB with dd, using dd if=/dev/sdb of=/dev/sdc bs=1M
count=300000 skip=300000 seek=300000
- repeat the "sync ; powercycle; dd" cycle until fully copied
Maybe the "powercycle" can be replace by "hdparm -w" or some other command
("udisks --detach /dev/sdb" ?). In that case, the whole procedure could be
scripted.
Hope this helps,
Kay
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