The PERC 3/di controller is able to import a single foreign disk, and treat it as a RAID 0. I do not know if a 7899 will be able to return the favor and read a RAID 0 from any RAID controller. RAID 1's are out unless they are a S/W mirror of RAID 0's.
I did some additional research since a posted my message.
It looks like the PERC 3/di controller whose disk I'm trying to read on an “3/Di Symbios Logic 53c1030 PCI-X Fusion-MPT Dual Ultra320 SCSI Adaptec 7899P”, puts its metadata on the two first cylinders. When I read the partition table beginning at cylinder 2, sfdisk sees it:
sfdisk /dev/sdc
Checking that no-one is using this disk right now ...
OK
Disk /dev/sdc: 17849 cylinders, 255 heads, 63 sectors/track
sfdisk: ERROR: sector 0 does not have an msdos signature
/dev/sdc: unrecognized partition table type
Old situation:
No partitions found
Input in the following format; absent fields get a default value.
Usually you only need to specify and (and perhaps ).
The FAST CLI utility is as granular as you can get with the PERC 3/DI controller, and I do not recall any commands that would allow one to circumvent the settings in the firmware.
Here is the CLI command ref from the 2.5 F/W version...
<ADMIN NOTE: Broken link has been removed from this post by Dell>
disk show partition will give you the offset and size of the partitions, but none of the create commands will allow you to specify the offset. I suppose you could create a small container, then a big one starting where the small one ended.
warwizard55
720 Posts
0
September 12th, 2005 21:00
Hi Alexander,
The PERC 3/di controller is able to import a single foreign disk, and treat it as a RAID 0. I do not know if a 7899 will be able to return the favor and read a RAID 0 from any RAID controller. RAID 1's are out unless they are a S/W mirror of RAID 0's.
warwizard DCSP
usfops
3 Posts
0
September 12th, 2005 23:00
I did some additional research since a posted my message.
It looks like the PERC 3/di controller whose disk I'm trying to read on an “3/Di Symbios Logic 53c1030 PCI-X Fusion-MPT Dual Ultra320 SCSI Adaptec 7899P”, puts its metadata on the two first cylinders. When I read the partition table beginning at cylinder 2, sfdisk sees it:
sfdisk /dev/sdc
Checking that no-one is using this disk right now ...
OK
Disk /dev/sdc: 17849 cylinders, 255 heads, 63 sectors/track
sfdisk: ERROR: sector 0 does not have an msdos signature
/dev/sdc: unrecognized partition table type
Old situation:
No partitions found
Input in the following format; absent fields get a default value.
Usually you only need to specify and (and perhaps ).
/dev/sdc1 :2
/dev/sdc1 2 17848 17847 143356027+ 83 Linux
/dev/sdc2 :
/dev/sdc2 0+ 1 2- 16064+ 83 Linux
/dev/sdc3 :
/dev/sdc3 0 - 0 0 0 Empty
/dev/sdc4 :
/dev/sdc4 0 - 0 0 0 Empty
Does anybody know how to force reading partition table starting with a certain displacement from cylinder 0 (zero)?
Is it possible to configure PERC 3/di controller to write its metadata at the end of the disk?
Alexander
warwizard55
720 Posts
0
September 13th, 2005 20:00
Hi Alexander,
The FAST CLI utility is as granular as you can get with the PERC 3/DI controller, and I do not recall any commands that would allow one to circumvent the settings in the firmware.
Here is the CLI command ref from the 2.5 F/W version...
<ADMIN NOTE: Broken link has been removed from this post by Dell>
disk show partition will give you the offset and size of the partitions, but none of the create commands will allow you to specify the offset. I suppose you could create a small container, then a big one starting where the small one ended.
warwizard