On Fri, Jul 13, 2007 at 08:01:08AM +0100, David Laight wrote:
>On Thu, Jul 12, 2007 at 06:13:58PM -0400, George Georgalis wrote:
>> 
>> the ffsv1 filesystem in raid0a has an offset of 63;
>> and the entire rraid0d has an offset of 63. per below, does
>> this answer your question / look correct?
>> 
>> # /dev/rraid0d:
>> type: RAID
>> disk: raid
>> label: fictitious
>> 
>> 16 partitions:
>> #        size    offset     fstype [fsize bsize cpg/sgs]
>>  a:   1024128        63     4.2BSD   1024  8192 46552  # (Cyl.      0*-   1000*)
>...
>> # /dev/rwd1d:
>> type: ESDI
>> disk: ST3750640AS     
>> label: fictitious
>> 
>> 5 partitions:
>> #        size    offset     fstype [fsize bsize cpg/sgs]
>>  a: 1465149105        63       RAID                     # (Cyl.      0*- 1453520)
>
>That isn't going to work (as you found out).
>The sector numbers in the raid's disklabel are relative to the raid set
>itself, and you shouldn't have left a 63 sector gap at the front.
>The bootcode doesn't have access to the label of the raid, and assumes that
>the root filesystem is at the start of it.

thanks, I was aware the raid0x offset is relative
to the RAID offset.  It makes sense that raid0a
should have an offset of 0, but I thought it worked
different.

>You might manage to fudge things by making the 'a' partition of the main
>disk reference sector 63+64+63=190 (ie where the root fs starts) and
>moving the raid entry to 'e'
>Try it first by adding the extra ptn as 'e', and interrupting the boot
>program (during the countdown) and typing 'boot hd1e'.

I tried using wd1e to point to the "a: 1024128 63
4.2BSD" partition (e: 1465148978 190 RAID) but the
primary said "boot: no such file or directory" ...
anyway one of the partitions has 100Gb on it with a
zillion hardlinks; I'd like to fix this vs fudge the
table or recreate that data.

my plan is to change the RAID partition to UNKNOWN
boot into wd0; change back the in-core label for
wd1a to RAID, backup the raid0a partition to raid0i;
repartition so the raid0a has an offset of 0, newfs
it, and restore root partition from raid0i.

// George


-- 
George Georgalis, information systems scientist <IXOYE><