hujirong
asked on
What is a drive in AIX?
Hi
I am reading these lines from "AIX 5L Practical Performance Tools and Tuning Guide". What does a drive mean in AIX? What I see is all directories. How can I find out what files are on what drive?
"For example, if an application accesses two or more files at the same time, adding an additional disk drive might improve the disk-I/O rate if the files that are accessed at the
same time are placed on different drives."
Thanks
Jirong
I am reading these lines from "AIX 5L Practical Performance Tools and Tuning Guide". What does a drive mean in AIX? What I see is all directories. How can I find out what files are on what drive?
"For example, if an application accesses two or more files at the same time, adding an additional disk drive might improve the disk-I/O rate if the files that are accessed at the
same time are placed on different drives."
Thanks
Jirong
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Typically in a SAN environment the actual arrays will be created/defined on the san itself. You will likely have to access the sans controller and see which physical drives are assigned to what LUN. Chances are the hdisks the aix box sees are allready raid arrays of some type.
The short answer is you can't tell.
You will need to speak to your SAN Admin to find out how the logical disks were created and presented to AIX. AIX doesn't know if it's using a RAID array or a physical disk and even if it did it wouldn't know what type of RAID array, whether these are exclusive disks or shared with other machines.
You will need to speak to your SAN Admin to find out how the logical disks were created and presented to AIX. AIX doesn't know if it's using a RAID array or a physical disk and even if it did it wouldn't know what type of RAID array, whether these are exclusive disks or shared with other machines.
No comment has been added to this question in more than 21 days, so it is now classified as abandoned.
I will leave the following recommendation for this question in the Cleanup topic area:
accept Lhotch http:#16383002
Any objections should be posted here in the next 4 days. After that time, the question will be closed.
gheist
EE Cleanup Volunteer
I will leave the following recommendation for this question in the Cleanup topic area:
accept Lhotch http:#16383002
Any objections should be posted here in the next 4 days. After that time, the question will be closed.
gheist
EE Cleanup Volunteer
Ignoring Graeme_Cowell http:#16659946 as rewording of first answer.
ASKER
I know we are using SAN. How do I know which one it is? How much can I know about my storage from the following output.:
/home/jihu $ lspv
hdisk0 0007d13d2c7ac2e9 rootvg active
hdisk1 0007d13dc0e5928e rootvg active
hdisk2 0007d13dc29e4e04 ccvg active
hdisk3 none None
hdisk4 none None
hdisk5 none None
hdisk6 none None
hdisk7 none None
hdisk8 none None
vpath0 0007d13dc0ecc475 appsvg active
/home/jihu $ lscfg
INSTALLED RESOURCE LIST
The following resources are installed on the machine.
+/- = Added or deleted from Resource List.
* = Diagnostic support not available.
Model Architecture: chrp
Model Implementation: Multiple Processor, PCI bus
+ sys0 System Obj
ect
+ sysplanar0 System Pla
nar
* pci2 U0.1-P1 PCI Bus
* pci10 U0.1-P2 PCI Bus
* pci11 U0.1-P2 PCI Bus
+ ent1 U0.1-P1/E1 10/100 Mbp
s Ethernet PCI Adapter II (1410ff01)
* pci12 U0.1-P2 PCI Bus
+ fcs1 U0.1-P2-I5/Q1 FC Adapter
* fscsi1 U0.1-P2-I5/Q1 FC SCSI I/
O Controller Protocol Device
* hdisk7 U0.1-P2-I5/Q1-W10000000C92
5F20
* hdisk8 U0.1-P2-I5/Q1-W10000000C92
5F20
* pci1 U0.1-P1 PCI Bus
* pci7 U0.1-P2 PCI Bus
* pci8 U0.1-P2 PCI Bus
+ scsi2 U0.1-P2/Z3 Wide/Fast-
20 SCSI I/O Controller
* pci9 U0.1-P2 PCI Bus
+ fcs0 U0.1-P2-I3/Q1 FC Adapter
* fscsi0 U0.1-P2-I3/Q1 FC SCSI I/
O Controller Protocol Device
* hdisk3 U0.1-P2-I3/Q1-W5005076300C
5F20
* hdisk4 U0.1-P2-I3/Q1-W5005076300C
5F20
* hdisk5 U0.1-P2-I3/Q1-W5005076300C
5F20
* hdisk6 U0.1-P2-I3/Q1-W5005076300C
5F20
* pci0 U0.1-P1 PCI Bus
* isa0 U0.1-P1 ISA Bus
+ fda0 U0.1-P1/D1 Standard I
/O Diskette Adapter
+ fd0 U0.1-P1-D1 Diskette D
rive
* siokma0 U0.1-P1/K1 Keyboard/M
ouse Adapter
+ sioka0 U0.1-P1/K1 Keyboard A
dapter
+ sioma0 U0.1-P1/K1 Mouse Adap
ter
+ ppa0 U0.1-P1/R1 CHRP IEEE1
284 (ECP) Parallel Port Adapter
+ sa0 U0.1-P1/S1 Standard I
/O Serial Port
+ tty0 U0.1-P1/S1-L0 Asynchrono
us Terminal
+ sa1 U0.1-P1/S2 Standard I
/O Serial Port
+ sa2 U0.1-P1/S3 Standard I
/O Serial Port
* ide0 U0.1-P1/Q6 ATA/IDE Co
ntroller Device
+ cd0 U0.1-P1/Q6-A0 IDE CD-ROM
Drive I (650 MB)
* pci3 U0.1-P2 PCI Bus
* pci4 U0.1-P2 PCI Bus
+ ent0 U0.1-P1/E2 10/100 Mbp
s Ethernet PCI Adapter II (1410ff01)
* pci5 U0.1-P2 PCI Bus
+ scsi0 U0.1-P2/Z1 Wide/Ultra
-3 SCSI I/O Controller
+ hdisk0 U0.1-P2/Z1-A8 16 Bit LVD
SCSI Disk Drive (36400 MB)
+ hdisk1 U0.1-P2/Z1-A9 16 Bit LVD
SCSI Disk Drive (36400 MB)
+ hdisk2 U0.1-P2/Z1-Aa 16 Bit LVD
SCSI Disk Drive (36400 MB)
+ ses0 U0.1-P2/Z1-Af SCSI Enclo
sure Services Device
+ scsi1 U0.1-P2/Z2 Wide/Ultra
-3 SCSI I/O Controller
* pci6 U0.1-P2 PCI Bus
+ L2cache0 L2 Cache
+ mem0 Memory
+ proc1 U0.1-P1-C1 Processor
+ proc2 U0.1-P1-C2 Processor
/home/jihu $