29 Apr
2008
29 Apr
'08
7:13 p.m.
On Tue, Apr 29, 2008 at 5:37 PM, Patrick Finnegan
<pat at computer-refuge.org> wrote:
Oh, SCSI READ6 (08h) (21-bit LBA) vs. SCSI READ10 (28h) (32-bit LBA).
That makes sense now. Thanks.
Anyone know
the details on the magic figure of 1.073GB for a MicroVAX
3100? Does that work out to being a certain logical block threshold
above which something breaks?
Yes, it's 2^21, 512 byte blocks. In the older SCSI command set that the
firmware on those uses, I think that the maximum block count is 2^21 -
1. Going over that may cause the firmware to overwrite the wrong part
of the disk when it tries to do a crash dump. Also, booting with a
bigger disk may not work.