Hard drive "oscillates"!
13-Jul-92 01:55:45
Sb: #62354-Hard drive "oscillates"!
Fm: Don Curtis/SYSOP 76703,4321
To: daniel wolf 70250,626
Dan,
While, yes, it's true that some units immediately return a
successful completion op code…it's also true that the vast majority of
them will actually do the low level format. As an example (I thought I
gave it before…didn't you read it?)…I've got two different versions of
the Conner CP-340 (admittedly an older drive). One specifically designed
for (and sold only to) Apple for use on the Mac, and one OEM'ed to AT&T for
use in a mini. The Mac style won't low level format, the AT&T style will.
At work, we've got CDC, SeaGate, HP, Micropolis and other SCSI
drives, they all will do a low level format when properly commanded to do
so.
As to automatic re-mapping…generally it depends on the driver
software rather than the on-drive ROM firmware. For obvious reasons…you
may not want a read error automatically remapped; whereas, on a write
error, you may want that automatically remapped. But then again, you may
not want write errors automatically covered.
Don