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List:       sun-managers
Subject:    Re: First target ID must be less than other member target IDs.
From:       Rob McMahon <Rob.McMahon () warwick ! ac ! uk>
Date:       2009-10-30 16:01:50
Message-ID: 4AEB0DEE.9070005 () warwick ! ac ! uk
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The saga continues.  I had two responses, one saying to use software 
mirroring.  We're trying to move away from this because of problems 
people have had in the past when the system disk goes ...  The second 
was to bite the bullet and swap the disks.

Disks duly swapped.

 > raidctl -c c3t2d0 c3t3d0
Cannot create RAID volume, disk "c3t2d0" is mounted .

Yes, I know thanks, I want a mirror of it, but I booted failsafe and 
tried again.  This time I got the scary warning:

Creating RAID volume c3t2d0 will destroy all data on member disks, 
proceed (y/n)?

By the manual, it says the secondary disk will get the data from the 
first.  The first should not be destroyed.

Okay, move back to software mirroring.  Here's the VTOC of the first disk:

*                          First     Sector    Last
* Partition  Tag  Flags    Sector     Count    Sector  Mount Directory
        0      2    00      16065  12289725  12305789   /
        1      3    01   12305790  12289725  24595514
        2      5    00          0 286455015 286455014
        3      7    00   24595515  40965750  65561264   /var
        4      4    00   65561265  12707415  78268679   /usr/local
        5      0    00   78268680 207977490 286246169   /data
        7      0    00  286246170     48195 286294364
        8      1    01          0     16065     16064


 > metadb -f -a -c3 c3t2d0s7
metadb: schufia: c3t2d0s7: overlaps with c3t2d0s0 which is mounted as '/'

No, it doesn't, not even close.

Maybe it's confused because of the spare space I arranged at the end of 
the disk for the RAID controller to use.  s2 extends past this, but 
there is no other partition referring to it.  Try shrinking partition 2, 
so that it matches.

n> p
Current partition table (original):
Total disk cylinders available: 17845 + 2 (reserved cylinders)

Part      Tag    Flag     Cylinders         Size            Blocks
   0       root    wm       1 -   765        5.86GB    (765/0/0)    12289725
   1       swap    wu     766 -  1530        5.86GB    (765/0/0)    12289725
   2     backup    wm       0 - 17830      136.59GB    (17831/0/0) 286455015
   3        var    wm    1531 -  4080       19.53GB    (2550/0/0)   40965750
   4        usr    wm    4081 -  4871        6.06GB    (791/0/0)    12707415
   5 unassigned    wm    4872 - 17817       99.17GB    (12946/0/0) 207977490
   6 unassigned    wu       0                0         (0/0/0)             0
   7 unassigned    wm   17818 - 17820       23.53MB    (3/0/0)         48195
   8       boot    wu       0 -     0        7.84MB    (1/0/0)         16065
   9 unassigned    wu       0                0         (0/0/0)             0

partition> 2
Part      Tag    Flag     Cylinders         Size            Blocks
   2     backup    wm       0 - 17830      136.59GB    (17831/0/0) 286455015

Enter partition id tag[backup]:
Enter partition permission flags[wm]:
Enter new starting cyl[0]:
Enter partition size[286455015b, 17831c, 17830e, 139870.61mb, 136.59gb]: 
17820e

Warning: Partition with V_BACKUP tag should specify full disk capacity.
partition>

Aargh.  I know, but please just do what I tell you, okay ?  I create a 
metadb on the second disk.

 > metadb -f -a -c3 c3t3d0s7

works okay.

 > fgrep d3 /etc/lvm/md.tab
# d3 (/var)
d3      -m d30
d30     1 1 c3t2d0s3
d31     1 1 c3t3d0s3
 > metainit d30
metainit: schufia: /etc/lvm/md.tab line 8: c3t2d0s3: overlaps with 
c3t2d0s0 which is mounted as '/'
 >

No, it doesn't!

Can anyone help me out here, please.  What am I missing.

Your input would be very much appreciated.

Cheers,

Rob

On 27/10/2009 15:31, Rob McMahon wrote:
> I'm trying to create a RAID volume on a Sun Fire X4100 M2.
> /etc/release says
> Solaris 10 11/06 s10x_u3wos_10 X86
>
> The running system is on c3t3d0, we've replaced the disk in c3t2d0, and
> want to create a hardware mirror to it.
>
>   >  raidctl -c c3t3d0 c3t2d0
> First target ID must be less than other member target IDs.
>
> This seems like a strange restriction, has anyone got any insight into
> this, any ways round it ?  Do I really have to reconfigure the machine,
> take it down, swap the disks, and bring it back up again before I can do
> this ?  This is fairly urgent, this is a production machine, and we're
> going to have to take a decision quickly.  I'd like to be able to do it
> without any downtime.
>
> Thanks,
>
> Rob
>
>    


-- 
E-Mail:	Rob.McMahon@warwick.ac.uk		PHONE:  +44 24 7652 3037
Rob McMahon, IT Services, Warwick University, Coventry, CV4 7AL, England
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