10 More Discussions You Might Find Interesting
1. Red Hat
Hi guys,
thanks for helping out.
If you have two boot disk mirrored and your primary boot disk fails, how will you boot the system from the second disk?
Thank you very much for your assistance on this matter.
Arrey (5 Replies)
Discussion started by: cjashu
5 Replies
2. Solaris
I have a v480 with a mirrored boot disk c1t0 and c1t1. The drives themselves don't show a failure but the mirror's need maintenance.
This is my plan for replacing the drive. I would love feedback to point out what I"m missing or where my steps are incorrect.
Two things I believe I'm... (3 Replies)
Discussion started by: pcoffey
3 Replies
3. Solaris
So I have mirrored disk already set up from c1t0d0 to c1t1d0. Is there some special procedures that I need to do before I do and then try to boot from the mirrored disk? I am using a V490 if that helps... (7 Replies)
Discussion started by: drew_1980
7 Replies
4. Solaris
# metastat
d1: Mirror
Submirror 0: d11
State: Okay
Submirror 1: d12
State: Okay
Pass: 1
Read option: roundrobin (default)
Write option: parallel (default)
Size: 14582208 blocks (7.0 GB)
d11: Submirror of d1
State: Okay
Size: 14582208 blocks... (2 Replies)
Discussion started by: Exposure
2 Replies
5. HP-UX
Hello All,
Am trynig to identify if the local HD's on our BL860 (running 11v3) are indeed mirrored to each other.
Cheers,
Cameron (3 Replies)
Discussion started by: Cameron
3 Replies
6. Solaris
We use SW mirroring (RAID1) using SVM for our SUN servers (which we OEM to end clients with our application on). When I need to make a tape backup for the server (disk), I disable mirroring and perform backup of the entire disk to tape using ufsdump. This process requires an outage and sensitive as... (8 Replies)
Discussion started by: StarSol
8 Replies
7. Solaris
Hi, Im getting a downtime of 4 hrs to do porting of bootdisks.
Currently, the system is running on Sf4800. 2 internal disk 36G connected to a SE3510 storage.
We're getting 72G disks and we want to restore the OS from the current 36G to the 72G disk. System is under veritas volume manager ctrl.... (4 Replies)
Discussion started by: incredible
4 Replies
8. Solaris
Hi guys,
I havent done this before but iam trying to create an image of a mirrorred drive.
Correct me if iam wrong, but when i have two disks setup in raid configuration and have them mirrored in solaris. It then defines at one entity.
How would i create a "flar" image of that one entity... (3 Replies)
Discussion started by: tlee
3 Replies
9. UNIX for Dummies Questions & Answers
What is the correct mkfs syntax to create mirrored disk files systems? I need to make the file system 20gb. For example:
machine# mkfs -F ufs /dev/md/dsk/d40
size not specified
ufs usage: mkfs special size(sectors) \
-m : dump fs cmd line used to make this partition
-V : print this... (4 Replies)
Discussion started by: GLJ@USC
4 Replies
10. AIX
I have AIX 5.1
I ran these commands and was not able to see what disk were mirrored to what. I thought this is what I should do?
lslv -m rd |more
lslv -m db |more
I get a error stating that it can't find or in the device configuation databse.
Is there another way to look? I have a physcal... (1 Reply)
Discussion started by: rocker40
1 Replies
CCD(4) BSD Kernel Interfaces Manual CCD(4)
NAME
ccd -- Concatenated disk driver
SYNOPSIS
pseudo-device ccd [count]
DESCRIPTION
The ccd driver provides the capability of combining one or more disks/partitions into one virtual disk.
This document assumes that you're familiar with how to generate kernels, how to properly configure disks and pseudo-devices in a kernel con-
figuration file, and how to partition disks.
Note that the 'raw' partitions of the disks must not be combined. Each component partition should be offset at least one cylinder from the
beginning of the component disk. This avoids potential conflicts between the component disk's disklabel and the ccd's disklabel. The kernel
will only allow component partitions of type FS_CCD. But for now, it allows partition of all types since some port lacks support of an on-
disk BSD disklabel. The partition of FS_UNUSED may be rejected because device driver of component disk will refuse it.
In order to compile in support for the ccd, you must add a line similar to the following to your kernel configuration file:
pseudo-device ccd 4 # concatenated disk devices
The count argument is how many ccds memory is allocated for at boot time. In this example, no more than 4 ccds may be configured.
A ccd may be either serially concatenated or interleaved. To serially concatenate the partitions, specify the interleave factor of 0.
If a ccd is interleaved correctly, a ``striping'' effect is achieved, which can increase performance. Since the interleave factor is
expressed in units of DEV_BSIZE, one must account for sector sizes other than DEV_BSIZE in order to calculate the correct interleave. The
kernel will not allow an interleave factor less than the size of the largest component sector divided by DEV_BSIZE.
Note that best performance is achieved if all component disks have the same geometry and size. Optimum striping cannot occur with different
disk types.
Also note that the total size of concatenated disk may vary depending on the interleave factor even if the exact same components are concate-
nated. And an old on-disk disklabel may be read after interleave factor change. As a result, the disklabel may contain wrong partition
geometry and will cause an error when doing I/O near the end of concatenated disk.
There is a run-time utility that is used for configuring ccds. See ccdconfig(8) for more information.
WARNINGS
If just one (or more) of the disks in a non-mirrored ccd fails, the entire file system will be lost.
FILES
/dev/{,r}ccd* ccd device special files.
SEE ALSO
config(1), MAKEDEV(8), ccdconfig(8), fsck(8), mount(8), newfs(8)
HISTORY
The concatenated disk driver was originally written at the University of Utah.
BSD
March 5, 2004 BSD