IBM DS8000 manual Troubleshooting and monitoring, proc pseudo file system

￿2787 2 Gigabit Fibre Channel Disk Controller PCI-X

For more information on OS/400 support for DS8000, please see Appendix B, “Using DS8000 with iSeries” on page 373.

More information on running Linux in an iSeries partition can be found in the iSeries Information Center at:

http://publib.boulder.ibm.com/iseries/v5r2/ic2924/index.htm

For running Linux in an i5 partition check, the i5 Information Center at:

http://publib.boulder.ibm.com/infocenter/iseries/v1r2s/en_US/info/iphbi/iphbi.pdf

Troubleshooting and monitoring

The /proc pseudo file system

The /proc pseudo file system is maintained by the Linux kernel and provides dynamic information about the system. The directory /proc/scsi contains information about the installed and attached SCSI devices.

The file /proc/scsi/scsi contains a list of all attached SCSI devices, including disk, tapes, processors, and so on. Example A-16shows a sample /proc/scsi/scsi file.

Example: A-16 Sample /proc/scsi/scsi file

knox:~ # cat /proc/scsi/scsi
Attached devices:
Host: scsi0 Channel: 00 Id: 00 Lun: 00
Vendor: IBM-ESXS Model: DTN036C1UCDY10F			Rev: S25J
Type:	Direct-Access		ANSI SCSI revision: 03
Host: scsi0 Channel: 00 Id: 08 Lun: 00
Vendor: IBM		Model: 32P0032a S320 1	Rev: 1
Type:	Processor		ANSI SCSI revision: 02
Host: scsi2 Channel: 00 Id: 00 Lun: 00
Vendor: IBM		Model: 2107921	Rev: .545
Type:	Direct-Access		ANSI SCSI revision: 03
Host: scsi2 Channel: 00 Id: 00 Lun: 01
Vendor: IBM		Model: 2107921	Rev: .545
Type:	Direct-Access		ANSI SCSI revision: 03
Host: scsi2 Channel: 00 Id: 00 Lun: 02
Vendor: IBM		Model: 2107921	Rev: .545
Type:	Direct-Access		ANSI SCSI revision: 03
Host: scsi3 Channel: 00 Id: 00 Lun: 00
Vendor: IBM		Model: 2107921	Rev: .545
Type:	Direct-Access		ANSI SCSI revision: 03
Host: scsi3 Channel: 00 Id: 00 Lun: 01
Vendor: IBM		Model: 2107921	Rev: .545
Type:	Direct-Access		ANSI SCSI revision: 03
Host: scsi3 Channel: 00 Id: 00 Lun: 02
Vendor: IBM		Model: 2107921	Rev: .545
Type:	Direct-Access		ANSI SCSI revision: 03

There also is an entry in /proc for each HBA, with driver and firmware levels, error counters, and information about the attached devices. Example A-17 on page 365 shows the condensed content of the entry for a QLogic Fibre Channel HBA.

364DS8000 Series: Concepts and Architecture