How to break mirror disks?

Hello,
I have a SF 280R was previously configured RAID 1 2x36GB ... OS 10
disk space is running low so I'd like to break the mirror and use the 2nd HD for storage.
Is this possible? Has anyone done this before without reloading the OS?
Thanks in advance for your help.
checkers

Using Disk Suite it is very easy, edit your /etc/vfstab and replace the md entries with the ctdt entries
/dev/md/dsk/d4 /dev/md/rdsk/d4 /usr ufs 1 no -
/dev/md/dsk/d3 /dev/md/rdsk/d3 /var ufs 1 no -
/dev/md/dsk/d5 /dev/md/rdsk/d5 /opt ufs 2 yes -
becomes
/dev/dsk/c1t0d0s4 /dev/rdsk/c1t0d0s4 /usr ufs 1 no -
/dev/dsk/c1t0d0s3 /dev/rdsk/c1t0d0s3 /var ufs 1 no -
/dev/dsk/c1t0d0s5 /dev/rdsk/c1t0d0s5 /opt ufs 2 yes -
reboot and metaclear the old metadevices ( # metaclear d4 )
User format to make sure you have the correct ctdt #s
Root partiotion requires an addtional step, you need to comment out this section in /etc/system.
rootdev:/pseudo/md@0:0,0,blk
The other forceload of md stuff can be left in.
We did this to our /opt partitions back when the F-280s were new, now 7yrs later I'm going back to fully mirrored as the drives are getting old.
A bonus feature of the F-280 is that it has FC disks, so the boot alias is not for a SCSI ID (determied by slot in an E class or V class box) but the WWNN of the drive, so if you need to change your boot disk you will also need to change the boot alias in the OPENBOOTPROM.

Similar Messages

Solaris x86: How to boot from Veritas mirror disk?

Hello team,
We are using trailware Veritas Storage Foundation (VxVM) on Solaris 10 x86 system and need help in booting from alternative boot disk(Mirror disk).
Steps did :
1. Mirrored the root disk group using veritas volume manager command *"vxrootmir"*
2. Updated the bootpath with mirror disk path in /boot/solaris/bootenv.rc
Updated the EEPROM information:
# bootadm update-archive -R /a
3. Edited the grub configuration file, /boot/grub/menu.lst
Created the following entry similar to primary disk entry to allow the root disk mirror to be booted
title Oracle Solaris 10 8/11 s10x_u10wos_17b X86 <VxVM: Alternate Boot Disk>
findroot (rootfs0,0,a)
kernel /platform/i86pc/multiboot
module /platform/i86pc/boot_archive
4. reboot -- -r
At the time of boot, selected the newly added entry from the grub list and got the following error,
*"Reboot and select proper boot device or insert boot media in selected device and press a key".*
I am unable to move further from here, is this because of the veritas trial version we are using ?
Please help in resolving this issue and also explain the step by step process of booting from alternative boot disk on a x86 machine.
Let me know if you find anything inappropriate. Looking forward for your replies.
Thanks in advance.

Hi--
I have not seen this message before but a quick google search says that is pretty common and is related to the system
trying to boot from a different device (not the one you intended). Can you check your BIOS settings and possibly remove
devices from the boot order setting... Otherwise, I would suggest running installgrub on the disk that you are trying to boot
from.
I'm curious why you are trying Veritas. Is there a Veritas feature that you need? You might consider trying ZFS if you haven't
already. Its very simple to set up and use.
Thanks, Cindy

How to configure local disk on OVM Server as storage space to create VMs

Hello,
We have installed OVM Server 3.1.1 on a machine that has 250 GB of Hard disk space [Single disk].
While installing used an option - Remove all partitions and create a new default partition layout.
Around 4GB has been used and remaining 246 GB is left as free space.
From OVM Manager - the server is discovered but didn't discovered the physical disk [i.e. remaining 246 GB raw disk space].
Can someone help me to understand how to use local disk as storage space for creating and running VM's.
Thanks
Srinivas

You can? You've used every conceivable BIOS out there? You must really be full of yourself. There is absolutely no BIOS that I know of that gives this basic function. BIOSs do not "hard partition" anything. A "BIOS" is not made for such things. Do you even know what "BIOS" stands for?
I wonder why there is some many wanting to do this and are having problems.... I mean if it is such a straight forward thing to do..... It must be down right "intuitive".
You maybe speaking of a RAID "BIOS" but you obviously think you're not. Some motherboards have integrated RAID abilities. Intel RST comes to mind... BUT this isn't a feature of a MOTHERBOARD BIOS.
I've got some $50,000 servers that will not break a single hard drive up into multiple logical drives..... Now, I haven't worked on a "Stinkpad" for many years. Don't want to. However, I have never seen one that would do what you're saying you're doing.
You maybe trying to help.... but you're leading people down a wrong path.
Its just as easy to run virtual box and use the virtual box templates for Oracle VM. In fact, its more practical if you want to run Oracle VM on a laptop for testing purposes than blowing everything away and attempting to setup different LUNS on a single hard drive.
For your review...
http://www.oracle.com/technetwork/articles/servers-storage-admin/configure-vm-templates-1656261.html
Although it's more reliable to use a separate location (such as an NFS share) for a storage repository, you can use a local disk of your Oracle VM Server instead, thus taking advantage of the local storage option. Beware, though: Oracle VM Server 3.0 doesn't allow you to utilize the unused space on the physical disk it's installed on. For local storage, you'll need at least one more physical disk. In other words, you'll need a total of two disks at minimum on your Oracle VM Server host if you want to use local storage. In practice, though, local storage is not a primary use case. The major downside to this approach is that local storage, by definition, cannot be shared between different servers.
Edited by: user12273962 on Dec 10, 2012 10:40 AM

How to replace a disk within a parity space

I have been searching the net for better documentation on this, but so far not a lot of information on what happens when I want to do the following (this is for home use - I am not a storage admin):
I had a JBOD array with 8 disks in it. 3x3TB and 5x2TB. I had this array thin provisioned to 45 TiB. When I hit about 13 TiB of storage, the drive stopped accepting new data and it was time to expand. This made sense to me as I had
about 19 TB or 17.3 TiB of room, minus parity, I'm about there. Perhaps I could have done more to maximize usage, but that point is moot now. What I did was buy and add a new 4TB disk to the array.
I had a Storage Pool containing all my disks, and I added this new 4TB disk to the pool. I had a Virtual Disk sitting on that pool in Single Parity mode. After adding the drive, I was unable to get the existing virtual disk to use that drive.
I imagine this was due to the number of columns previously allocated to the array. I had some ideas on how to offload the data into a new Virtual Disk with more columns, but nothing really worked, so I bought 3 more 4TB disks, reduced my data footprint
to 12TB, copied everything off, and destroyed the array.
Next I re-built my media server and put the original 8 disks in place, along with the fourth new 4TB disk, as well as a 200 GB disk, a 600 GB disk, and a 1.5 TB disk that I had laying around. I'm in day 2 of my copy operation from BackupDrive1
to the new 12 disk array. When that completes, I want to use that disk to replace the 200 GB disk I was using as a placeholder.
Everything I read on the internet has been inconclusive to me thus far. Microsoft's own documentation claims that replacing a disk is as simple as removing the old disk and adding the new one, but I don't think it is. When I tested this
using the 4TB disk and the other 3 oddballs with a smaller subset of data, it definitely wasn't as easy as that.
My intuition tells me that what I am supposed to do is power down the server and replace the disk I intend to replace, then add that disk to the now degraded storage pool. At that point I should remove the old drive from the pool and repair the virtual
disk. However, I am nervous that "removing" a drive will decrease the number of columns, and that in the end I won't be able to use the space from the 4TB drive. I've seen questions on the net on how to replace a disk and none of them
seem to specifically apply to parity spaces, most are talking about either simple spaces (not happening) and mirror spaces. I understand the difference but Microsoft's implementation of this is not as straightforward as other products I have used.
In other cases it was as simple as this: Physically replace disk, receive prompt that your old disk is missing, but you have a new disk, and would you like to rebuild the data from the old disk on the new disk? Yes? Then wait patiently while
we painfully write 4TB of 1's and 0's and you're good to go. I want this button in Storage Spaces please.

Shaon,
Thanks for your reply. However, this does not sufficiently answer my question.
The 200GB, 600 GB and 1.5 TB drives are temporary drives, since from my experience, adding drives to an array with 8 or more drives does not work. I want to replace these drives with 4TB drives, leaving the smallest drive at 2TB.
Also, I was under the assumption that parity (which I'm imagining works in storage spaces somewhat like RAID 50), claims a space for parity equal to the size of the largest drive in the bunch, not the smallest, leaving me with a total space equal to the sum
of the drives minus 4TB.
I have experimented with the suggested workflow, but through the GUI this does not work. I add the new drive, remove the missing one, and get a popup explaining that my virtual disk will be "In Repair". However, this popup vanishes before I can
click OK (almost certainly a Microsoft bug). If I click OK before I finish reading this, nothing happens. The drive doesn't repair. I need to retire the disk through PowerShell, and then use PowerShell to repair the virtual disk. This
works out OK for a while, but once I start using it, the new drive infallibly gives me an error of "Stale Metadata". I have tried this with 3 different 4TB drives, so I have doubts that this is actually a hardware issue with the drives. More than
likely, this is a false positive caused by an issue with Storage Spaces. It does give me pause on continuing to use the disk, so I end up swapping the old 200GB disk back in every time and the space works fine at that point. Right now I am attempting
to replace the 1.5 TB disk instead, to see if that does anything. After that, I plan on running the Optimize-Volume -DriveLetter D -Analyze -Verbose cmdlet to attempt to rebalance the data on the disk. Should I expect that command to do anything
useful?
Just a side comment, this product has been around for a solid 2 years now. I've found the documentation to be almost non-existent, with the exception of one TechNet page that every question seems to have a link to in the answer. This page helps
almost no-one as it lacks in examples that apply to the questions that are asked. It gives little information on parity spaces, and does not equivocally answer the one question that many parity space users have, "What is the correct workflow for growing
my pool?" I understand that in a mirrored situation, you can't grow the pool without adding a certain amount of disks, but if parity functions anything like RAID 50, this should not be a limitation. It amazes me that this is the only document Microsoft
seems to have regarding Storage Spaces, and this single document has seemingly never been updated. Take this feedback however you will, I truly hope that more discussion will reach the right people and help Microsoft fix the issues with a product that
actually has a lot of promise.

Booting from a mirrored disk on a zfs root system

Hi all,
I am a newbee here.
I have a zfs root system with mirrored disks c0t0d0s0 and c1t0d0s0, grub has been installed on c0t0d0s0 and OS booting is just fine.
Now the question is if I want to boot the OS from the mirrored disk c1t0d0s0, how can I achieve that.
OS is solaris 10 update 7.
I installed the grub to c1t0d0s0 and assume menu.lst need to be changed (but i don't know how), somehow no luck.
# zpool status zfsroot
pool: zfsroot
state: ONLINE
scrub: none requested
config:
NAME STATE READ WRITE CKSUM
zfsroot ONLINE 0 0 0
mirror ONLINE 0 0 0
c1t0d0s0 ONLINE 0 0 0
c0t0d0s0 ONLINE 0 0 0
# bootadm list-menu
The location for the active GRUB menu is: /zfsroot/boot/grub/menu.lst
default 0
timeout 10
0 s10u6-zfs
1 s10u6-zfs failsafe
# tail /zfsroot/boot/grub/menu.lst
title s10u6-zfs
findroot (BE_s10u6-zfs,0,a)
bootfs zfsroot/ROOT/s10u6-zfs
kernel$ /platform/i86pc/multiboot -B $ZFS-BOOTFS
module /platform/i86pc/boot_archive
title s10u6-zfs failsafe
findroot (BE_s10u6-zfs,0,a)
bootfs zfsroot/ROOT/s10u6-zfs
kernel /boot/multiboot kernel/unix -s -B console=ttya
module /boot/x86.miniroot-safe
Appreciate anyone can provide some tips.
Thanks.
Mizuki

This is what I have in my notes.... not sure if I wrote them or not. This is a sparc example as well. I believe on my x86 I still have to tell the bios to boot the mirror.
After attaching mirror (if the mirror was not present during the initial install) you need to fix the boot block.
#installboot -F zfs /usr/platform/`uname -i`/lib/fs/zfs/bootblk /dev/rdsk/c0t1d0s0
If the primary then fails you need to set the obp to the mirror:
ok>boot disk1
for example
Apparently there is a way to set the obp to search for a bootable disk automatically.
Good notes on all kinds of zfs and boot issues here:
http://www.solarisinternals.com/wiki/index.php/ZFS_Troubleshooting_Guide#ZFS_Boot_Issues

Booting from mirror disk question

Solaris 10 on Ultra 40M2
I got 2 disks mirrored with SVM.
OK, I can boot off either disk but I am not real sure that when I boot off the mirror, I am actually booting off that mirror. The reason I am saying this, when I look at output of df in either case, I always get the same disk, d1. Shouldn't I get d2 if it's the mirror boot?
How do I confirm that when I boot off the mirror, I get the mirror? Here is the menu.lst file:
title Solaris 10 5/08 s10x_u5wos_10 X86
kernel /platform/i86pc/multiboot
module /platform/i86pc/boot_archive
title Windows XP
rootnoverify (hd2,0)
map (hd0) (hd2)
map (hd2) (hd0)
chainloader +1
title Solaris 10 5/08 s10x_u5wos_10 X86 Mirror Disk
root (hd1,0,a)
kernel /platform/i86pc/multiboot
module /platform/i86pc/boot_archive
title Solaris failsafe
kernel /boot/multiboot kernel/unix -s
module /boot/x86.miniroot-safe
#: df -kFufs
Filesystem            kbytes    used   avail capacity Mounted on
/dev/md/dsk/d1       119098248 12882647 105024619    11%    /
/dev/dsk/c1t0d0s4    51634246   51217 51066687     1%    /part2
/dev/dsk/c1t0d0s3    51634246   51217 51066687     1%    /part1
/dev/dsk/c1t0d0s5    51634246   51217 51066687     1%    /part3
/dev/dsk/c1t0d0s7    10331209   10265 10217632     1%    /export/home

df shows the metadevice (logical) not the physical disk
prtconf -pv | grep bootpath
provides the device path, example /pci@c,600000/scsi@2,disk@0,0:a
eeprom | grep devalias
show your device alias, example disk1 /pci@c,600000/scsi@2,disk@0,0:a

How to add more disk space into /   root file system

Hi All,
Linux 2.6.18-128
can anyone please let us know how to add more disk space into "/" root file system.
i have added new hard disk with space of 20GB,
[root@rac2 shm]# df -h
Filesystem            Size Used Avail Use% Mounted on
/dev/hda1             965M 767M 149M 84% /
/dev/hda7             1.9G 234M 1.6G 13% /var
/dev/hda6             2.9G   69M 2.7G   3% /tmp
/dev/hda3             7.6G 4.2G 3.0G 59% /usr
/dev/hda2              18G   12G 4.8G 71% /u01
LABLE=/               2.0G     0 2.0G   0% /dev/shm
/dev/hdb2             8.9G 149M 8.3G   2% /vm
[root@rac2 shm]#

Dude! wrote:
I would actually question whether or not more disks increase the risk of a disk failure. One disk can break as likely as one of two of more disks.
Simple stats. Buying 2 lottery tickets instead of one, gives you 2 chances to win the lottery prize. Not 1. Even though the odds of winning per ticket remains unchanged.
2 disks buy you 2 tickets in The-Drive-Failure lottery.
Back in the 90's, BT (British Telecom) had a 80+ node OPS cluster build with Pyramid MPP hardware. They had a dedicated store of scsi disks for replacing failed disks - as there were disk failure fairly often due to the number of disks. (a Pryamid MPP chassis looked like a Xmas tree with all the scsi drive LEDs, and BT had several)
In my experience - one should rather expect a drive failure sooner, than later. And have some kind of contingency plan in place to recover from the failure.
The use of symbolic links instead of striping the filesystem protects from the complete loss of the enchilada if a volume member fails, but it does not reduce the risk of loosing data.
I would rather buy a single ticket for the drive failure lottery for a root drive, than 2 tickets in this case. And using symbolic links to "offload" non-critical files to the 2nd drive means that its lottery ticket prize is not a non-bootable server due to a toasted root drive.

How to Break the cluster between Two servers

Hi Experts,
Since Iu2019m new to BOBJ XI R2.I would like to know how to break the cluster between two servers.
Description :
So far we took the copy of QAS Server1 to the new QAS server2 (Through Mirroring Tool ). Now those two servers are cluster together, I can see QAS server1 CMS Name, Cluster Name, cluster member name in QAS Server2 (CMC-> Setting -> Cluster).
Besides in QAS Server1 CMS Name and Cluster name are pointing to the QAS Server1, except Cluster Member (This is still have two members Server1 and Server2).(CMC-> Setting -> Cluster).
In QAS Server1 and QAS Server2 (CMS-> Servers), I can able see both server name under Machine Name tab.
I would like to make those two servers as independent servers. There are two different data source for those two servers. I want to remove the cluster in both servers.
Right now QAS Server1 is running and QAS Server2 is stopped.
If i create/modify a group under new Mapped NT Member Groups in QAS server2 ,it is getting reflecting in QAS server 1.
Could you please tell me the steps to resolve this problem.
BO Version: BO XI R2
Regards,
Sridharan

Hi,
Maybe the external CMS is still 'attached' to your SIA node. Please go to the CCM (Central Configuration Manager) and stop the SIA (Server Intelligent Agent). On one of the tabs you can see if there is an external CMS part of your environment. Delete it and restart the SIA. Retry if you can delete the services now from within your CMS. It may well be that you have to stop both environments and delete each others CMS via the CCM to get it working. If you have not changed any permissions for your Administrator account the security model will not be the one causing this.
Hope this helps...
Martijn van Foeken
Focuzz BI Services
http://www.focuzz.nl
http://nl.linkedin.com/in/martijnvanfoeken

How do I access Disk Utility for 10.7.1?

How do I access Disk Utility for 10.7.1? I found it in the forums a few weeks ago, used it, then lost the directions. This is a last ditch attempt
to use OS Lion. I parted my hair incorrectly when I installed and have been plagued by the dread rainbow spinning ball in EVERY application. Yes, every. Name one, Safari, Firefox, Text Edit, Mail, Excel, Word, iTunes, Garage Band, Calculator, Calender, iPhoto....yes, every, and I cannot
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I am a writer and a musician so imagine the frustration. OS 10.6 is an option of course. My dedication to Apple and each new OS is deep so
I am hoping that somehow there will a fix, an upgrade, something that does not require me to go bac to the much more endangered species named OS.
hahhaa! Just stalled waiting for the ball to finish with it's random spinning.... SO, this is like a last desperate .... it just did two more stalls.
NO OTHER apps running, just little Firefox holding on for dear life, last desperate request for a fix.
MacKeeper has been great in sending helpful directions for getting the Antivirus to work after it mysteriously decided to stop working, Quite MacKeeper, go to Activity Monitor, force quit helper, start up MacKeeper and run program. It works!
SO before my third stall stops me, please post directions to open disk utility in administration mode so that I can do any further repairs that have not worked by using it from the open system. Also keychain synching stopped working with Lion.
Thanks to any and all who can help.

Press and hold Command-R keys and reboot. You'll then start up in the Lion Recovery HD. You'll find Disk Utility there.
Command-R to the rescue.
Just hold down Command-R during startup and Lion Recovery springs into action. It lets you choose from common utilities: You can run Disk Utility to check or repair your hard drive, erase your hard drive and reinstall a fresh copy of Lion, or restore your Mac from a Time Machine backup. You can even use Safari to get help from Apple Support online. And if Lion Recovery encounters problems, it will automatically connect to Apple over the Internet.

How do I mirror my Macbook Air (Mid 2013) with my IMac (late 2006)?

How do I mirror my Macbook Air (Mid 2013) with my IMac (late 2006)?

Look at Target Display Mode:
http://support.apple.com/kb/ph4469
http://support.apple.com/kb/ht3924
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How do i mirror my macbook air with apple tv now that i have mountain lion

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I have a late 2011 model MacBook Pro running Mountain Lion. I love the AirPlay mirroring feature with Apple TV...BUT, how do I mirror with TVs that don't have Apple TV? I used to run a cable from my mini display port to the HDMI input of a TV.

I have a late 2011 model MacBook Pro running Mountain Lion. I love the AirPlay mirroring feature with Apple TV...BUT, how do I mirror with TVs that don't have Apple TV? I used to run a cable from my mini display port to the HDMI input of a TV. This feature seems to be lost in the Mountain Lion upgrade. Did Apple feel that once Mountain Lion came out that EVERYONE would have Apple TV? There are no settings in System Preferences/Display like there used to be...only for AirPlay Mirroring.

Running a cable to the HDMI port is still supported. (and still works on mine).
If the Arrangement tab in System Preferences > Displays isn't present then it doesn't recognize the physical connection. Double check all cables. If that doesn't work try a PRAM reset:
http://support.apple.com/kb/ht1379

I want to set up the Time Machine and I would love to use the Time Capsule but since I already have a wireless router I need suggestions on what other external disks Apple could recommend to use with the Time Machine and how to configure that disk

I want to set up the Time Machine and I would love to use the Time
Capsule but since I already have a wireless router I need suggestions on
what other
external disks Apple could recommend to use with the Time Machine and
how to configure that disk.
A complication that I need to resolve is the fact that I am using Vmware
Fusion to be able to use Windows on my Mac. Now it seems that Time
Machine is not backing up my files
on that virtual Windows without additional configuration and my question
is whether you can advise me here or whether this is only a matter for
the Fusion virtual machine.

If you want to use Time Capsule you can.. you simply bridge it and plug it into the existing router.. wireless can be either turned off or used to reinforce the existing wireless.. eg use 5ghz in the TC which is much faster than your 2.4ghz.
You can also use a NAS.. many brands available but the top brands are synology, qnap and netgear readynas series. These will all do Time Machine backups although how well always depends on Apple sticking to a standard. There are cheaper ones.. I bought a single disk zyxel which was rebadged and sold through my local supermarket. It actually works very well for TM at least on Snow Leopard. Major changes were made in Lion and again ML so do not instantly think it will work on later versions. I haven't tried it yet with those versions.
Any external drive can be plugged into the mac. Use the one with the fastest connection or cheapest price according to your budget. USB2 drives are cheap and plentiful. But no where near as fast as USB3 or FW800. So just pick whichever suits the ports on your Mac. Interesting Apple finally moved to USB3 on their latest computers.
TM should exclude the VM partition file.. it is useless backing it up from Mac OS side.. and will slow TM as it needs to backup that partition everyday for no purpose.. TM cannot see the files inside it to backup just the changes.
You need to backup windows from windows. Use MSbackup to external drive.. if you have pro or ultimate versions you can backup to network drive. But MSbackup is a dog.. at least until the latest version it cannot restore the partition without first loading windows. There are about a zillion backup software versions for windows.. look up reviews and buy one which works for you. I use a free one Macrium Reflect which does full disk backups and is easy to restore.. to do incremental backups though you have to pay for it.

How do I mirror my Mac Book Pro onto my samsung HD TV?

How do I mirror my Mac Book Pro onto my samsung HD TV?

Hi e,
Connect the MBP to the TV's input with the proper cables. Select that input on the TV. Select mirroring in Sys Prefs > Displays.

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