I posted some errpt output,see Phone Support, that this forum graciously looked at and confirmed what we suspected, that one of our RAID5 disks is failing. I have a replacement, but am having trouble downing the old disk. If I try and run Remove a Disk from smit, it says the device is busy. The drive has not died yet. We tried pulling it out, but it still remained in the available state in List all Defined disks.
If I recall correct from your other post it was hdisk2?
You need to know if it is part of a VG:
Next check if it is mirrored:
You will get a list where there is a column calle LPs and PPs.
If the PPs are a multiple of LPs, you have set up a mirror, which is good and makes it easy. You'll have to check that for all LVs/FS's that are listed. Else you have
If you don't have a mirror, you'll have to varyoffvg the VG and replace the disk, but you'll have to restore from your backup.
When it is mirrored like described above, you can just do following, like "man unmirrorvg" says:
How this is exactly done is depending on the RAID adapter (more precisely: the adapters driver software), so i can give you only general directions.
If the failing disk is part of a RAID you will probably not be able to manage the disk device itself. A RAID works like this: there are several disks connected to an adapter. The driver software of the adapter makes one big virtual disk out of the several physical ones and presents this virtual construct as a physical disk to the machine. (This is what is done during the "RAID initialization" or however it is called with your software. The driver/adapter writes some bookkeeping information onto the physical disk to be able to use them the described way.)
Only this virtual disk is added to a VG as a "Physical Volume" and from there on normal LVM procedures apply.
Your first task is to make the PV free from OS access. You can do this by either breaking the mirror (if the VG is mirrored) or by varying off the VG as zaxxon suggested. Since the "disk" in the VG is only a virtual construct there is no strict relationship between disks and logical volumes. All the logical volumes on the virtual RAID disk are "smudged across" the physical disks comprising the RAID.
After this you need to use the adapters driver software (in case of the IBM SCSI RAID adapter this is plugged into SMITty and the diag utility) to remove the disk from the RAID, after which the RAID is in status "reduced". then physically change the disks and add the new disk to the RAID. This will probably take some time as the new disk has to be written with the data first to be useful in the RAID. Only then varyon again and start using the VG again.
Do you need to backup? In principle you don't, because in a RAID all the disks hold all the information with redundancy. The classical case is 5 disks holding the capacity of 4 - for this penalty it is possible to replace every single disk without losing data, because the data it holds is also available on the other 4. This does NOT mean that a backup would be a bad idea: not at all! It is better to have a backup you don't need than to need a backup you don't have.
Thanks alot for your useful advice. We are really in a bind here. The IBM server this is located on has a RAID adapter, but it turns out the vendor never configured it! I am looking into installing an external scsi drive, and dumping to it.
Hi,
I am facing issue with one of the drive is solaris 10. it is showing offline in the messages file
scsi: WARNING: /pci@2,600000/QLGC,qlc@0/fp@0,0/ssd@w5006016746e00b1b,0 (ssd0):
drive offline
genunix: WARNING: Page83 data not standards compliant DGC LUNZ 0430
... (1 Reply)
HP rp5450 (L2000)
running HP-UX 11.11B
Using DLT 7000 and DLT 4000 tape drives for nightly full backups
Backup jobs created by SAM
DLT 7000 cron entry is as follows:
00 2 * * 1-6 /usr/sam/lbin/br_backup DLT FULL Y /dev/rmt/0m /var/sam/graphLCAa17036 root Y 1 N > /var/sam/SAM_br_msgs 2>&1... (1 Reply)
I have a 320 GB drive which dual boots Windows and Debian:
Disk /dev/sda: 320.1 GB, 320072933376 bytes
255 heads, 63 sectors/track, 38913 cylinders, total 625142448 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal):... (0 Replies)
Hi Everyone,
we have a shell script "DLP_recv.sh" that has below command which is supposed to return the number of active instances of itself, which means of there is no other instance then commad would return 1 (for the current instance). The problem is that it sometimes it returns 0 which is... (3 Replies)
Anyone know how I can map a windows drive to an apache shared drive?
In my httpd.conf file, I have:
Alias /merc_rpts/ "/u/merc_rpts/"
<Directory "/u/merc_rpts">
Options Indexes
</Directory>
I'm able to bring up a browser and see the contents of this folder.
In... (0 Replies)
Hi
I have 2 75GB SCSI hard drives and 2 250GB SATA hard drives which are using RAID Level 1 respectively. I wana have both FTP and Apache installed on them as services. I'm wondering what's the best partitioning schem? I wana use FC3 as my OS, so, I thought I can use the 75GB hard drive as the /... (0 Replies)