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Re: /etc/disktab on vax



On 06/25/2012 12:52 PM, David Brownlee wrote:
On 24 June 2012 09:08, Anders Magnusson <ragge%ludd.ltu.se@localhost> wrote:
On 06/23/2012 10:51 PM, David Brownlee wrote:
So would it make sense to keep the entries but just update them to a
single large partition? That retains the key ability to safely label
such disks, without the (of only historical relevance) partition
tables?
Yes, maybe, but there is one other thing that is influencing (which also is
only of historical interest):
The vax massbus disks uses DEC 144 bad block forwarding, which means that a
bunch of blocks at the end of the c partition are unallocated and used to
replace bad blocks in other places on the disk. This is managed by the
bad144 program.
The disktab entries are avoiding these blocks, but it must be possible to
access them via the c partition to allocate them.
So thats a single large a partition which excludes that area? Or am I
missing something?
The c partition includes it, but no data partition can access these cylinders.

-- Ragge



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