I really shot myself in the foot this time. Here is the scenario
Have a Solaris server Solaris 10 x86 Update 8.
Installed an LSI MegaRaid 9280 raid controller and attached a 16 bay JBOD box to it, created a RAID6 virtual drive with 1 hot spare.
Created a ZFS filesystem on it and loaded it up with users data about 7.6TB.
Created another identical system and rsynced the data from the first to the second.
Both of the servers are to act as fileservers exporting the directoies via NFS
Then I discovered the disk performance was horrible, did some research and discover my configuration was less the ideal. I decide to install Ubuntu 10.04LTS server on one of the machines and rebuild the RAID filesystem. This is where I shot myself in the foot.
I did zpool destroy on the ZFS system
Then installed Ubuntu
Ubuntu recognized the disk and an fdisk -l displayed the correct partitioning.
Code:
Disk /dev/sdb: 12995.5 GB, 12995497295872 bytes
255 heads, 63 sectors/track, 1579945 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x08046e04
Device Boot Start End Blocks Id System
/dev/sdb1 1 267350 2147483647+ ee GPT
I then created an ext3 filesystem on it, loaded all of the data on it and things were fine for about a week.
I started get I/O errors any time I accessed the filesystem. I tried unmounting the file system and remounting but it would not remount
Code:
root@fileserver2:~/testdisk-6.13# mount /dev/sdb1 /raid2
mount: special device /dev/sdb1 does not exist
Tried rebooting still no luck
I ran parted then and it gives this error:
Code:
root@fileserver2:~/testdisk-6.13# parted /dev/sdb
GNU Parted 2.2
Using /dev/sdb
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted) print
Error: /dev/sdb: unrecognised disk label
(parted) quit
I then realized that when I created the filesystem I had not run parted to create a proper partition table. Big oops.
A few questions questions
1 Why would mkfs allow me to create a filesystem on disk that was not partitioned correctly?
Why did it take a week for things to go south?
and finally is this a reasoble way to recover from my screwup:
Run parted:
Code:
mklabel gpt
rescue 0 267350
Any hints, advice or other solutions would be greatly appreciated.
Hi All,
Any idea why i'm having this warning during boot:
WARNING: /pci@1f,0/pci@1,1/ide@3/dad@1,0 (dad1):
corrupt label - wrong magic number
This happens after I added another ide HD and reinstall it from solaris 10 to solaris 8.
Thanks in advance. (7 Replies)
Hi,
I have a Sun X4200, when I try to reboot the machine it's not detecting the drive and it shows the following error when I try to rebuilt it. I am not sure whether its a bad HD or something else.
Label says 983040 blocks: Drive says 983039 blocks
WARNING:... (1 Reply)
Hi all,
currently , my root filesystem already reach 90 ++%
I already add more cylinder in the root partition as below
Part Tag Flag Cylinders Size Blocks
0 root wm 67 - 5086 38.46GB (5020/0/0) 80646300
1 swap wu 1 - ... (11 Replies)
Can someone please help me out here.
I have SunSolaris server that has a ridiculous about of space on it. several hundred gigabytes of space. There are lots of partitions on this server that has at least 100Gs on them.
I want to mount just one of these partitions on my Linux server so I can... (4 Replies)
I have created 1 LUN.
1)LUN 00BB 200GB /dev/rdsk/c1t3d44
/dev/rdsk/c2t28d44
/dev/rdsk/c3t19d44
/dev/rdsk/c4t12d44
2) Already added the new entry into sd.conf and rebooted.
3) Already done these:
powercf –q
power config
4) power display dev=all
I can see the new Symmetrix device.... (1 Reply)
I've seen several posts that are similar to what I'm trying to do but no dice. I have a server (SunFire V215) that went belly up. I've set up a new one. I'm getting a corrupt label: wrong magic number error. Everything I'm seeing says label the drives, but if I do I'm afraid I'll lose the data... (0 Replies)
Hello everyone,
I am trying to mount an ext4 filesystem which I created from Ubuntu. But mount command fails saying:
prakhar@Solaris:~$ sudo mount /dev/dsk/c10t0d0p1 /mnt
Password:
mount: /dev/dsk/c10t0d0p1 is not this fstype
And I also tried this:
prakhar@Solaris:~$ fstyp... (6 Replies)
(Don't you hate being on holiday and being the only IT person in the family?)
Got a wonderful thanksgiving surprise .. dead windows-8 laptop with "important" unbacked-up data. No worries, I have my my fedora labtop and a magical SATA to USB converter. Plugged in the drive, and ... can't mount... (4 Replies)
Discussion started by: derekludwig
4 Replies
LEARN ABOUT SUNOS
chs
chs(7D) Devices chs(7D)NAME
chs - IBM ServeRAID PCI host adapter driver
DESCRIPTION
The chs driver is the IBM ServeRAID PCI controller driver.
PRECONFIGURATION
Known Problems and Limitations
To prevent data loss, a SCSI disk drive that is not defined as part of any physical pack within a logical drive will not be accessible
through the Solaris operating environment.
CONFIGURATION
Auto-configuration code determines whether the adapter is present at the configured address and what types of devices are attached to it.
The IBM ServeRAID is primarily used as a disk array (system drive) controller.
To configure the attached disk arrays, you must configure the controller (using the configuration utilities provided by the hardware manu-
facturer) before booting the Solaris operating environment You use the configuration utilities to set RAID levels, stripe parameters, cache
mechanisms and perform other functions. For more information, see the user manual supplied with your hardware.
FILES
/kernel/drv/chs.conf chs configuration file
/dev/dsk/cndn[s|p]n block device
/dev/rdsk/cndn[s|p]n raw device where:
cn controller n
dn LUN n (0-7)
sn UNIX system slice n (0-15)
pn fdisk(1M)partition(0)ATTRIBUTES
See attributes(5) for a description of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
|Architecture |x86 |
+-----------------------------+-----------------------------+
SEE ALSO fdisk(1M), attributes(5), cmdk(7D)SunOS 5.10 27 November 2000 chs(7D)
02-05-2012
