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which disk is this (direct access)

 
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senthil_kumar_1
Super Advisor

‎05-07-2009 10:16 AM

‎05-07-2009 10:16 AM

which disk is this (direct access)

Hi

In one my HP-UX shows the following disk.

# ioscan -fnC disk

disk 3 0/2/1/0/4/0.8.0.1.0.0.1 sdisk CLAIMED DEVICE COMPAQ MSA1000 VOLUME
/dev/dsk/c4t0d1 /dev/rdsk/c4t0d1



# lndsla04:/homeroot->diskinfo /dev/rdsk/c3t0d0
SCSI describe of /dev/rdsk/c3t0d0:
vendor: HP 73.4G
product id: ST373453LC
type: direct access
size: 71687369 Kbytes
bytes per sector: 512


So the disk "/dev/rdsk/c3t0d0" is shown as direct access.

pls what is this.
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Torsten.
Acclaimed Contributor

‎05-07-2009 10:19 AM

‎05-07-2009 10:19 AM

Solution

Re: which disk is this (direct access)

The first is an array LUN, the second is a real (seagate) disk.

Hope this helps!
Regards
Torsten.

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Pete Randall
Outstanding Contributor

‎05-07-2009 10:23 AM

‎05-07-2009 10:23 AM

Re: which disk is this (direct access)

What is "direct access"?

It's a term used to describe disk devices. They are directly accessed devices.

http://en.wikipedia.org/wiki/Direct_access_storage_device


Pete

Pete
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Court Campbell
Honored Contributor

‎05-07-2009 10:51 AM

‎05-07-2009 10:51 AM

Re: which disk is this (direct access)

It's more than likely your one of your internal disks since it is showing a product id of ST373453LC.
"The difference between me and you? I will read the man page." and "Respect the hat." and "You could just do a search on ITRC, you don't need to start a thread on a topic that's been answered 100 times already." Oh, and "What. no points???"
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senthil_kumar_1
Super Advisor

‎05-07-2009 10:57 AM

‎05-07-2009 10:57 AM

Re: which disk is this (direct access)


Sorry i have wrongly entered.

The correct output is

1)#ioscan -fnC disk

disk 3 0/2/1/0/4/0.8.0.1.0.0.1 sdisk CLAIMED DEVICE COMPAQ MSA1000 VOLUME
/dev/dsk/c4t0d1 /dev/rdsk/c4t0d1



2)lndsla04:/homeroot->diskinfo /dev/rdsk/c4t0d1
SCSI describe of /dev/rdsk/c4t0d1:
vendor: COMPAQ
product id: MSA1000 VOLUME
type: direct access
size: 430116277 Kbytes
bytes per sector: 512


So here what is "MSA1000 VOLUME"
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Court Campbell
Honored Contributor

‎05-07-2009 10:58 AM

‎05-07-2009 10:58 AM

Re: which disk is this (direct access)

Umm, it's a LUN from your MSA disk array.

http://www.compaq.com/storage/disk_storage/msa_diskarrays/index.html
"The difference between me and you? I will read the man page." and "Respect the hat." and "You could just do a search on ITRC, you don't need to start a thread on a topic that's been answered 100 times already." Oh, and "What. no points???"
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