12-21-2005
10 More Discussions You Might Find Interesting
1. HP-UX
In HP-UX 11.00
How can i check if there are disks mirrored (2 Replies)
Discussion started by: cgege
2 Replies
2. 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
3. UNIX for Dummies Questions & Answers
Hi all,
I have a V490 running with Solaris 10. The OS disk was mirrored. I wanted to break the mirror, boot with the secondary mirror, and re-mirror the OS with a new disk.
This is what I did,
detached the metadevices of the secondary mirror disk (disk 1)
metaclear-ed the metadevices,... (1 Reply)
Discussion started by: nitinp82
1 Replies
4. Solaris
Hello once again seeking your help,
I have a mirrored disk and need to unmirror it to mount it as a new file system (/export) but could not find the correct steps to do it with out affecting the original disk.
can anybody point me out on how to get this done.
Thanks!! (3 Replies)
Discussion started by: AQG
3 Replies
5. UNIX for Advanced & Expert Users
I have a HP proliant ML 570 G3 with two 146GB disk drives mirrored(RAID1+0)
windows server 2003 was installed on that disk.
I will add a disk.(scsi 300GB)
I will install Linux on that additional disk.
I want to create multiple-boot system.
Is it possible?
I wanna know how to create... (0 Replies)
Discussion started by: lifegeek
0 Replies
6. 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
7. 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
8. AIX
Hi all,
I need to extend a lv, but unfortunately I do not have enough space on my mirrored Volume group.
I've planned to add 2 more disks to this vg (for mirroring)
But ... what's the next steps to extend my lv using these 2 disks with a valid mirroring ?
1. extendvg myvg disk1 disk2... (3 Replies)
Discussion started by: unclefab
3 Replies
9. 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
10. 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
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