Software-based RAID5 on Aix Post: 302162417

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Operating Systems AIX Software-based RAID5 on Aix Post 302162417 by sapbcer on Tuesday 29th of January 2008 12:57:35 AM

01-29-2008

Banned

Quote:

Originally Posted by dukessd

I assume you mean scsi raid5 because fibre chanel or SSA disks are different.

As scsi raid5 in AIX software is not possible, there is no documentation.

For the information about the scsi hardware raid5 adapters try a google for:
site:ibm.com aix raid adapter systemp
site:ibm.com aix raid adapter systemp - Google Search
to get you started.

Systems up to power5 need a pci adapter for scsi raid5.
Some of these systems, like the 7026 H80 / M80 - p660 will also need an external storage enclosure because you can only fit 2 disks in the system unit.

Most power5 and power6 systems can accept a scsi raid enablement card that enhances the onboard scsi adapter to allow raid5 use of internal or external disks.

What is your systems machine type and model? Then we can look up the adapters and disk configurations that your system can use.

lsconf | head
will show your machine type and model

lsdev -Cc disk
and
lsdev -Cs scsi
will show the scsi disks and controllers in your system

There is result of execution:
# lsconf|head
System Model: IBM,9110-51A
Machine Serial Number: 06448CF
Processor Type: PowerPC_POWER5
Number Of Processors: 4
Processor Clock Speed: 1648 MHz
CPU Type: 64-bit
Kernel Type: 64-bit
LPAR Info: 1 06-448CF
Memory Size: 16016 MB
Good Memory Size: 16016 MB
/usr/sbin/lsconf: There is no process to read data written to a pipe.
# lsdev -Cc disk
hdisk0 Available 06-08-01-3,0 16 Bit LVD SCSI Disk Drive
hdisk1 Available 06-08-01-4,0 16 Bit LVD SCSI Disk Drive
hdisk2 Available 06-08-01-5,0 16 Bit LVD SCSI Disk Drive
hdisk3 Available 06-08-01-8,0 16 Bit LVD SCSI Disk Drive
hdisk4 Available 06-08-00-0,0 Other SCSI Disk Drive
hdisk5 Available 06-08-00-1,0 Other SCSI Disk Drive
hdisk6 Available 06-08-00-2,0 Other SCSI Disk Drive
hdisk7 Available 06-08-00-3,0 Other SCSI Disk Drive
# lsdev -Cs scsi
hdisk0 Available 06-08-01-3,0 16 Bit LVD SCSI Disk Drive
hdisk1 Available 06-08-01-4,0 16 Bit LVD SCSI Disk Drive
hdisk2 Available 06-08-01-5,0 16 Bit LVD SCSI Disk Drive
hdisk3 Available 06-08-01-8,0 16 Bit LVD SCSI Disk Drive
hdisk4 Available 06-08-00-0,0 Other SCSI Disk Drive
hdisk5 Available 06-08-00-1,0 Other SCSI Disk Drive
hdisk6 Available 06-08-00-2,0 Other SCSI Disk Drive
hdisk7 Available 06-08-00-3,0 Other SCSI Disk Drive
safte0 Available 06-08-00-6,0 SCSI Accessed Fault-Tolerant Enclosure Device
ses0 Available 06-08-01-15,0 SCSI Enclosure Services Device

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LEARN ABOUT CENTOS

tapset::scsi

tapset::scsi(3stap)													       tapset::scsi(3stap)

NAME

       tapset::scsi - systemtap scsi tapset

DESCRIPTION

	This family of probe points is used to probe SCSI activities.

       scsi.ioentry
	      Prepares a SCSI mid-layer request

	       See probe::scsi.ioentry(3stap)
	       for details.

       scsi.iodispatching
	      SCSI mid-layer dispatched low-level SCSI command

	       See probe::scsi.iodispatching(3stap)
	       for details.

       scsi.iodone
	      SCSI command completed by low level driver and enqueued into the done queue.

	       See probe::scsi.iodone(3stap)
	       for details.

       scsi.iocompleted
	      SCSI mid-layer running the completion processing for block device I/O requests

	       See probe::scsi.iocompleted(3stap)
	       for details.

       scsi.ioexecute
	      Create mid-layer SCSI request and wait for the result

	       See probe::scsi.ioexecute(3stap)
	       for details.

       scsi.set_state
	      Order SCSI device state change

	       See probe::scsi.set_state(3stap)
	       for details.

SEE ALSO

	  probe::scsi.ioentry(3stap),	   probe::scsi.iodispatching(3stap),	  probe::scsi.iodone(3stap),	 probe::scsi.iocompleted(3stap),
       probe::scsi.ioexecute(3stap),  probe::scsi.set_state(3stap),  stap(1), stapprobes(3stap)

IBM
									---						       tapset::scsi(3stap)