> I was wondering if it was possible to do a "low level" format
> on IDE drives on an ultra 5. When i run the format command , select a
> drive and tell it to format the drive it says it cant. I would like to
> wipe the discs clean. Is there anything i can do?
A LLF to wipe a drive clean is inappropriate even for SCSI drives.
LLF has side-effects which you probably want to avoid.
If you simply want to remove the bootstrap and partitioning information
all you need to do is zero the first 1K on the drive. Do something like
dd bs=1k count=1 < /dev/zero > /dev/rdsk/c0t0d1s2
If you're concerned about making confidential information unrecoverable,
then whatever you do (including a LLF) is *NOT* guaranteed to always
wipe out all your old data.
To be absolutely certain no one can recover your old data you have to
do what the goverenment does with its old disk drives, you have to
physically destroy the disk.
If you merely want to make a best effort at wiping out the old data
than you can simply zero the whole drive. Do something like this:
dd bs=64k < /dev/zero > /dev/rdsk/c0t0d1s2
Another method is to use the format command's analyze/purge function.
That gets most of the data but it specifically doesn't wipe out any
sectors that were automatically replaced by alternates due to I/O
errors detected by the drive's firmware. For some drives there isn't
any utility that lets you wipe out all the possible "bad" sectors
which can have (multiple) copies of your data.