Hallo,
we have a dell PowerEdge 6600 and a RedHat Linux 7.3 with kernel
2.40.20-9smp.
We initially had four drives 70 GB each bound to one RAID 5 array.
Since we needed more disk space we added two more physical drives (each 70
GB as well) that we wanted to become part of the RAID 5 array. We started
with one more drive.
We took one of the new disks in dellmgr and made it a RAID 1 drive in a new
array (somehow it was not possible to add this drive to the RAID 5 array
before it was not declared to an array of its own in advance) using:
configure - view/add - selecting the physical drive and making in RAID 1.
The we started a reconstruction of the existing RAID 5 array and included
the new drive in it using:
reconstruct - logical drive 0 - selected the new drive - changed to RAID 5 -
started the reconstruction.
After 20 hours the reconstruction was finished.
Dellmgr showed that the RAID 5 now contains 5 stripes.
We rebooted the system, but the only change recognizable was the one in
allmessages. No additional drives (like sdb), no empty room in /dev/sda (a
new partition cannot be added because there are no free sectors reported).
So we lost a lot of time but did not gain any additional free space.
Since the size of the logical drive did not change we thought of creating
another one in the RAID 5 array (hoping it would become /dev/sdb)but we
cannot find any way how to, because when we select the new drive under
configuration - add/view pressing F10 does not offer any menu.
Old settings in dellmgr
A00-00
A00-01
A00-02
A00-03
There is one logical Drive (0) with RAID 5, size 279512MB with 4 stripes and
stripe size 64k
New settings in dellmgr
A00-00
A00-01
A00-02
A00-03
A00-04
There is still one logical Drive (0) with RAID 5, size 279512MB with 5
stripes and stripe size 64k
meaning: The size of the logical drive has not changed though the array
gained 70 GB more
Extrakt of old allmessages
Aug 13 10:57:46 qntsv25 kernel: scsi0: scanning physical channel 1 for
devices.
Aug 13 10:57:46 qntsv25 kernel: Attached scsi disk sda at scsi0, channel 0,
id 0, lun 0
Aug 13 10:57:46 qntsv25 kernel: SCSI device sda: 429330432 512-byte hdwr
sectors (219817 MB)
Aug 13 10:57:46 qntsv25 kernel: Partition check:
Aug 13 10:57:46 qntsv25 kernel: sda: sda1 sda2 sda3 sda4 < sda5 sda6 sda7
sda8 sda9 >
Aug 13 10:57:46 qntsv25 kernel: Freeing unused kernel memory: 304k freed
Aug 13 10:57:46 qntsv25 kernel: Adding Swap: 2048248k swap-space (priority
-1)
Extrakt of new allmessages
Aug 24 13:05:46 qntsv25 kernel: scsi0: scanning physical channel 1 for
devices.
Aug 24 13:05:46 qntsv25 kernel: Attached scsi disk sda at scsi0, channel 0,
id 0, lun 0
Aug 24 13:05:46 qntsv25 kernel: SCSI device sda: 572440576 512-byte hdwr
sectors (293090 MB)
Aug 24 13:05:46 qntsv25 kernel: Partition check:
Aug 24 13:05:46 qntsv25 kernel: sda: sda1 sda2 sda3 sda4 < sda5 sda6 sda7
sda8 sda9 >
Aug 24 13:05:46 qntsv25 kernel: LVM version 1.0.5+(22/07/2002) module loaded
New and old Partitiontable
Festplatte /dev/sda: 255 Köpfe, 63 Sektoren, 35632 Zylinder
Einheiten: Sektoren mit 1 * 512 Bytes
Gerät boot. Anfang Ende Blöcke Id Dateisystemtyp
/dev/sda1 63 64259 32098+ de Dell Utility
/dev/sda2 * 64260 273104 104422+ 83 Linux
/dev/sda3 273105 61705664 30716280 83 Linux
/dev/sda4 61705665 429321059 183807697+ f Win95 Erw. (LBA)
/dev/sda5 61705728 69689969 3992121 83 Linux
/dev/sda6 69690033 110655719 20482843+ 83 Linux
/dev/sda7 110655783 172088279 30716248+ 83 Linux
/dev/sda8 172088343 176184854 2048256 82 Linux Swap
/dev/sda9 176184918 429321059 126568071 8e Linux LVM
Since the reconstruction of things does take so long we are really in need
of a detailed explanation of what to do to get (from the OS point of view) a
new drive (/dev/sdb) of 140 GB that is "save" as it is part of the RAID 5
array.
Can you supply us with this information as soon as possible.
Thank you very much in advance
Sincerely
Gesine
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