I am trying to reconstruct a failed 4 disk RAID5 Western Digital ShareSpace device using 3 of the 4 disks connected via USB to an Ubuntu 12.04 machine. I get what seems like a successful re-assemble from -
Code:
mdadm --assemble --force /dev/md2 /dev/sde4 /dev/sdf4 /dev/sdg4mdadm: /dev/md2 has been started with 3 drives (out of 4).
But then when I try to mount, it fails. I am logged in as root and when I try to troubleshoot with mdadm, I get odd returns such as -
mdadm --examine /dev/md2mdadm: No md superblock detected on /dev/md2.
Also, the system can't seem to find the volume -
vgscan -v Wiping cache of LVM-capable devices
Wiping internal VG cache
Reading all physical volumes. This may take a while...
Finding all volume groups
No volume groups found
I read in some other posts that the WD system uses LVM2. Could that be the issue? Here is the output from mdadm --detail
mdadm --detail /dev/md2/dev/md2:
Version : 0.90
Creation Time : Mon Oct 19 10:26:15 2009
Raid Level : raid5
Array Size : 5854981248 (5583.75 GiB 5995.50 GB)
Used Dev Size : 1951660416 (1861.25 GiB 1998.50 GB)
Raid Devices : 4
Total Devices : 3
Preferred Minor : 2
Persistence : Superblock is persistent
Update Time : Sun Sep 2 15:22:50 2012
State : clean, degraded
Active Devices : 3
Working Devices : 3
Failed Devices : 0
Spare Devices : 0
Layout : left-symmetric
Chunk Size : 64K
UUID : 4c4952ae:1477d756:234bdad8:bdaa1368
Events : 0.9246753
Number Major Minor RaidDevice State
0 8 84 0 active sync /dev/sdf4
1 8 68 1 active sync /dev/sde4
2 0 0 2 removed
3 8 100 3 active sync /dev/sdg4
Here's the result of the mount attempt-
mount -t auto dev/md2 /mnt/raidmount: special device dev/md2 does not exist
Can sed be used to take a existing record and reverse the order of defined character placement if there is no delimeters?
existing record:
0123456789CO
expected result:
9876543210CO
if there were delimeters I could define the delimeter and each placement would have an id which I... (1 Reply)
Hello, I am aware that our system has two hard drives with raid but i'm not sure as to the type of raid the system uses.
I tried this.
# df
Filesystem 512-blocks Free %Used Iused %Iused Mounted on
/dev/hd4 229376 76272 67% 6748 12% /
/dev/hd2 3080192... (1 Reply)
Dear ALl,
I have a RAID 5 volume which is as below
d120 r 60GB c1t2d0s5 c1t3d0s5 c1t4d0s5 c1t5d0s5
d7 r 99GB c1t2d0s0 c1t3d0s0 c1t4d0s0 c1t5d0s0
d110 r 99GB c1t2d0s4 c1t3d0s4 c1t4d0s4 c1t5d0s4
d8 r 99GB c1t2d0s1 c1t3d0s1... (2 Replies)
Hello All,
I have read enough of texts on Raid 01 and Raid 10 on solaris :wall: . But no-where found a way to create them using SVM. Some one pls tell me how to do or Post some link if that helps.
TIA
Curious
solarister (1 Reply)
Hello,
I have a scsi pci x raid controller card on which I had created a disk array of 3 disks
when I type lspv ; I used to see 3 physical disks ( two local disks and one raid 5 disk )
suddenly the raid 5 disk array disappeared ; so the hardware engineer thought the problem was with SCSI... (0 Replies)
Server Model: T5120 with 146G x4 disks.
OS: Solaris 10 - installed on c1t0d0.
Plan to use software raid (veritas volume mgr) on c1t2d0 disk.
After format and label the disk, still not able to detect using vxdiskadm.
Question:
Should I remove the hardware raid on c1t2d0 first?
My... (4 Replies)
Hello,
I want to delete a RAID configuration an old server has.
Since i haven't the chance to work with the specific raid controller in the past can you please help me how to perform the configuraiton?
I downloaded IBM ServeRAID Support CD but i wasn't able to configure the video card so i... (0 Replies)
Discussion started by: @dagio
0 Replies
LEARN ABOUT BSD
sysmsg
sysmsg(7D) Devices sysmsg(7D)NAME
sysmsg - system message routing to console devices
SYNOPSIS
/dev/sysmsg
DESCRIPTION
The file /dev/sysmsg routes output to a variable set of console devices. Writes to /dev/sysmsg are always directed to the system console
/dev/console, and are in addition directed to a set of auxiliary console devices managed by consadm(1M).
Only root has permission to write to this device.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWcsr |
+-----------------------------+-----------------------------+
|Interface Stability |Stable |
+-----------------------------+-----------------------------+
SEE ALSO consadm(1M), syslogd(1M) , attributes(5), console(7D)SunOS 5.10 13 Oct 1998 sysmsg(7D)