Mirroring disks with Solstice DiskSuite

From: Andreas Hoeschler (ahoesch_at_smartsoft.de)
Date: 06/26/03

Next message: Vichnevetski, Alexei: "can't open boot device....GE"

Previous message: Wolfgang Schwurack: "SUMMARY: SunPCi"
Next in thread: Andreas Hoeschler: "Re: Mirroring disks with Solstice DiskSuite"
Maybe reply: Andreas Hoeschler: "Re: Mirroring disks with Solstice DiskSuite"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] [ attachment ]

Date: Thu, 26 Jun 2003 20:51:04 +0200
To: sunmanagers@sunmanagers.org

Dear managers,

I am trying to setup disk mirroring on a SunFire 280R with two 36GByte
FC-AL disks. I followed the instructions in "Configuring Boot Disks
With Solstice DiskSuite Software" and
"http://www.slacksite.com/solaris/disksuite/disksuite.html". I can boot
from the first disk and metastat indicates that the second disk is
synchronized. How do I boot from the secod disk to check that the setup
really works?

Before setting up the mirror I did the following to get the disk names.

# ls -l /dev/rdsk/c1t0d0s0

lrwxrwxrwx 1 root root 74 Jun 26 17:27
/dev/rdsk/c1t0d0s0 ->
../../devices/pci@8,600000/SUNW,qlc@4/fp@0,0/
ssd@w21000004cfef623f,0:a,raw

# ls -l /dev/rdsk/c1t1d0s0

lrwxrwxrwx 1 root root 74 Jun 26 17:27
/dev/rdsk/c1t1d0s0 ->
../../devices/pci@8,600000/SUNW,qlc@4/fp@0,0/
ssd@w21000004cffd1290,0:a,raw

On the ok prompt show_disks returns the following

        {1} ok show-disks
        a) /pci@8,600000/SUNW,qlc@4/fp@0,0/disk
        b) /pci@8,700000/scsi@6,1/disk
        c) /pci@8,700000/scsi@6/disk
        q) NO SELECTION

I tried to setup the following alias and then boot.

ok nvalias bootdisk
/pci@8,600000/SUNW,qlc@4/fp@0,0/ssd@w21000004cfef623f,0:a
boot bootdisk

This failed. I no longer remember the error message. However, I read
something about replacing ssd with disk somewhere and then therefore
tried

ok nvalias bootdisk /pci@8,600000/SUNW,qlc@4/fp@0,0/disk@0,0
ok boot bootdisk

This worked. What alias/device string do I have to use to boot from the
second disk? All my attempts failed so far. I am missing a final bit of
information. Please help a newbie.

Thanks a lot in advance,

Andreas

Approach A:
========================================================
{0} ok boot pci@8,600000/SUNW,qlc@4/fp@0,0/disk@1,0
Resetting ...

screen not found.
keyboard not found.
Keyboard not present. Using ttya for input and output.

Sun Fire 280R (2 X UltraSPARC-III+) , No Keyboard
Copyright 1998-2002 Sun Microsystems, Inc. All rights reserved.
OpenBoot 4.5, 2048 MB memory installed, Serial #53447988.
Ethernet address 0:3:ba:2f:8d:34, Host ID: 832f8d34.

Rebooting with command: boot pci@8,600000/SUNW,qlc@4/fp@0,0/disk@1,0
Boot device: /pci@8,600000/SUNW,qlc@4/fp@0,0/disk@0,0 File and args:
pci@8,600000/SUNW,qlc@4/fp@0,0/disk@1,0
boot: cannot open pci@8,600000/SUNW,qlc@4/fp@0,0/disk@1,0
Enter filename [pci@8,600000/SUNW,qlc@4/fp@0,0/disk@1,0]:

This guy is asking fro a filename. What shall I enter.

Approach B:
=============================================
{0} ok boot disk1
Boot device: /pci@8,600000/SUNW,qlc@4/fp@0,0/disk@1,0 File and args:
Boot load failed.

{0} ok boot /pci@8,600000/SUNW,qlc@4/fp@0,0/ssd@w21000004cffd1290,0:a
Boot device: /pci@8,600000/SUNW,qlc@4/fp@0,0/ssd@w21000004cffd1290,0:a
File and args:

Can't locate boot device

Steps performed to setup the mirror:
==========================================================
Partition the first disk as follows:

        c1t0d0s0 / 20696 MByte
        c1t0d0s1 swap 7001 MByte
        c1t0d0s3 /var 5000 MByte
        c1t0d0s4 crash dumps 2000 MByte
        c1t0d0s7 state database 31 MByte

Copy the VTOC and boot block to the mirror:

dd if=/dev/rdsk/c1t0d0s2 of=/dev/rdsk/c1t1d0s2 count=16

Create the state database replicas as follows:

        metadb -a -f -c 2 c1t0d0s7
        metadb -a -c 2 c1t1d0s7
        echo set md:mirrored_root_flag=1 >> /etc/system

The -a and -f options used together create the initial replicas. The -a
option attaches a new database device and automatically edits the
/etc/system file. The -f option creates the actual database replica.

Create the metadevices as follows:

        metainit -f d10 1 1 c1t0d0s0
        metainit -f d11 1 1 c1t0d0s1
        metainit -f d13 1 1 c1t0d0s3

        metainit d20 1 1 c1t1d0s0
        metainit d21 1 1 c1t1d0s1
        metainit d23 1 1 c1t1d0s3

        metainit d0 -m d10
        metainit d1 -m d11
        metainit d3 -m d13

Make the system boot from the mirror as follows

metaroot d0

Replace the remaining partitions with metadevices in /etc/vfstab as
follows.

        cp /etc/vfstab /etc/vfstab.tmp
        cat /etc/vfstab.tmp | \
          sed s,/dev/dsk/c1t0d0s1,/dev/md/dsk/d1, | \
          sed s,/dev/dsk/c1t0d0s3,/dev/md/dsk/d3, | \
          sed s,/dev/rdsk/c1t0d0s3,/dev/md/rdsk/d3, > /etc/vfstab

Document the physical name on the two disks in the mirror:

# ls -l /dev/rdsk/c1t0d0s0

lrwxrwxrwx 1 root root 74 Jun 26 17:27
/dev/rdsk/c1t0d0s0 ->
../../devices/pci@8,600000/SUNW,qlc@4/fp@0,0/
ssd@w21000004cfef623f,0:a,raw

# ls -l /dev/rdsk/c1t1d0s0

lrwxrwxrwx 1 root root 74 Jun 26 17:27
/dev/rdsk/c1t1d0s0 ->
../../devices/pci@8,600000/SUNW,qlc@4/fp@0,0/
ssd@w21000004cffd1290,0:a,raw

Halt the system:

init 0

Create an OBP (open boot prompt) alias for the bootable disks. Beware
that for disks on certain controllers, the sd driver name must be
replaced by disk. Verify this, using the OBP show-disks command

        {1} ok show-disks
        a) /pci@8,600000/SUNW,qlc@4/fp@0,0/disk
        b) /pci@8,700000/scsi@6,1/disk
        c) /pci@8,700000/scsi@6/disk
        q) NO SELECTION

before entering the nvalias commands.

        ok nvalias bootdisk /pci@8,600000/SUNW,qlc@4/fp@0,0/disk@0,0
        ok nvalias mirrdisk /pci@8,600000/SUNW,qlc@4/fp@0,0/disk@0,1
        ok setenv boot-device bootdisk mirrdisk
        ok boot

        ok nvalias bootdisk
/pci@8,600000/SUNW,qlc@4/fp@0,0/ssd@w21000004cfef623f,0:a
        ok nvalias mirrdisk
/pci@8,600000/SUNW,qlc@4/fp@0,0/ssd@w21000004cffd1290,0:a
        ok setenv boot-device bootdisk mirrdisk
        ok boot

Attach the submirrors, as follows.

        metattach d0 d20
        metattach d1 d21
        metattach d3 d23

metastat output:
==============================================
# metastat
d0: Mirror
     Submirror 0: d10
       State: Okay
     Submirror 1: d20
       State: Resyncing
     Resync in progress: 0 % done
     Pass: 1
     Read option: roundrobin (default)
     Write option: parallel (default)
     Size: 42387408 blocks

d10: Submirror of d0
     State: Okay
     Size: 42387408 blocks
     Stripe 0:
         Device Start Block Dbase State Hot Spare
         c1t0d0s0 0 No Okay

d20: Submirror of d0
     State: Resyncing
     Size: 42387408 blocks
     Stripe 0:
         Device Start Block Dbase State Hot Spare
         c1t1d0s0 0 No Okay

d1: Mirror
     Submirror 0: d11
       State: Okay
     Submirror 1: d21
       State: Resyncing
     Resync in progress: 3 % done
     Pass: 1
     Read option: roundrobin (default)
     Write option: parallel (default)
     Size: 14338107 blocks

d11: Submirror of d1
     State: Okay
     Size: 14338107 blocks
     Stripe 0:
         Device Start Block Dbase State Hot Spare
         c1t0d0s1 0 No Okay

d21: Submirror of d1
     State: Resyncing
     Size: 14338107 blocks
     Stripe 0:
         Device Start Block Dbase State Hot Spare
         c1t1d0s1 0 No Okay

d3: Mirror
     Submirror 0: d13
       State: Okay
     Submirror 1: d23
       State: Okay
     Pass: 1
     Read option: roundrobin (default)
     Write option: parallel (default)
     Size: 10241505 blocks

d13: Submirror of d3
     State: Okay
     Size: 10241505 blocks
     Stripe 0:
         Device Start Block Dbase State Hot Spare
         c1t0d0s3 0 No Okay

d23: Submirror of d3
     State: Okay
     Size: 10241505 blocks
     Stripe 0:
         Device Start Block Dbase State Hot Spare
         c1t1d0s3 0 No Okay
_______________________________________________
sunmanagers mailing list
sunmanagers@sunmanagers.org
http://www.sunmanagers.org/mailman/listinfo/sunmanagers

Next message: Vichnevetski, Alexei: "can't open boot device....GE"

Previous message: Wolfgang Schwurack: "SUMMARY: SunPCi"
Next in thread: Andreas Hoeschler: "Re: Mirroring disks with Solstice DiskSuite"
Maybe reply: Andreas Hoeschler: "Re: Mirroring disks with Solstice DiskSuite"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] [ attachment ]

Relevant Pages

[HPADM] Summary MirrorDisk/UX 11.00
... disk 0 0/0/1/1.2.0 sdisk CLAIMED DEVICE HP 73.4GMAN3735MC ... Use mkboot to place the boot utilities in the boot area and add the AUTO file. ... LVM will resynchronize the new mirror copies. ... All you need to do is ftp it to your server, chmod 700 on the file then run the command with the cxtxdx name ...
(HP-UX-Admin)
Re: cant boot from mirrored boot drive
... If the disk containing the primary partition fails you will have to create a fault tolerant boot floppy to recover the installation. ... Do I break the mirror, shutdown and remove the good boot disk rdiskand just leave the disk that doesn't want to boot in and boot to the recovery conole to check it out? ... They are sata drives, drive 0 and drive 1 on the main system board's controller. ...
(microsoft.public.windows.server.general)
RE: Windows 2003 Mirror and Boot Partition
... For your complex hardware disk situation, ... How to mirror the system and boot partition in Windows ... | on the two new drives. ...
(microsoft.public.windows.server.general)
Re: No boot on win2k3 mirror
... Boot from your floppy to disk 1, try breaking the mirror and reinstate the ...
(microsoft.public.windows.server.general)
RE: Disk 0 Raid 1 mirror problem
... I have the same issue with a Dell 1750. ... I was able to boot to Disk1 without issues. ... the failed disk and replaced it with the new disk, and low and behold, the ... and recreate the mirror so I do have some redundancy to a point. ...
(microsoft.public.windows.server.general)