:
:On 1999-Dec-21 12:08:27 +1100, Matthew Dillon <[EMAIL PROTECTED]> wrote:
:> Tape drives may:
:> * Not support disconnection ...
:> * Implement a crappy SCSI command stack ...
:> * Not properly terminate the SCSI bus ...
:> * Introduce too much noise onto the SCSI bus due to bad design.
:
:Do modern drives still support these various `features'? I know
:there used to be problems, but I thought Greg was using a (presumably
:fairly recent) DLT drive. Given the normal data rates associated with
:DLT drives, I would have thought they would behave fairly well.
:
:BTW, since Greg mentioned he was thinking of using an AHA-1542B -
:I've found that mine won't work in sync mode. Whenever I tried to
:read or write, it would just timeout, until I disabled SYNC. (And
:if I increased the sync speed beyond 5MHz, the kernel would usually
:panic).
:
:Peter
They are supposed to support disconnection, and most do. But tape
drives tend to have buggy firmware - for example, the 20G Exabyte
drives can crash a SCSI bus if you use too small a block size. It
just isn't worth mixing them with your disks.
-Matt
Matthew Dillon
<[EMAIL PROTECTED]>
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