topic Re: Hot-Swapable or not???? in Operating System - Linux

Hot-Swapable or not????

Sac_3 — Tue, 03 Jul 2007 11:44:48 GMT

Hi,

How do we check if a disk is Hot swappable or not..?

Is it through hpaduclli command.? if so please see the output

PHYSICAL DRIVE IDENTIFICATION:

SCSI Port 1, Drive ID 0
Vendor Id: COMPAQ
Product Id: BF03685A35
Product Rev: HPB7
Vendor Specific: 3HX0L802
Serial Number: 3HX0L80200007427KZZ4
SCSI Inquiry Header: 00 00 03 12 8b 00 01 3e
Device Supports: Tagged Command Queueing
Linked Commands
Synchronous Data Transfer
16-bit Wide Data Transfer
Drive Type: 0x00 Parallel SCSI
Block Size: 512 bytes/sector
Total Blocks: 71123808 sectors/disk
Reserved Blocks: 1088 reserved sectors/disk
SCSI Inquiry Bits: 0x3E
Stamped for M&P: yes
Last Failure Reason: 0x0D (Drive hardware error)
Phys Drive Flags: 0xcd 0x25 0x95 0x01
Drive present and operational
Wide SCSI transfers Enabled
Ultra3 SCSI Enabled
S.M.A.R.T. Supported
S.M.A.R.T. Enabled
Quick Arbitration and Selection Capable
Configured as part of Logical Drive
Drive write cache setting is changeable and safe
SCSI LUN: 0
Spi Speed Rules: 0x18f00700
Physical Connector: J1 (controller connector attached to drive)
Physical Box on Bus: 0 (number of the physical enclosure in which drive resides)

Does "S.M.A.R.T. Supported & S.M.A.R.T. Enabled " means the disk is hot-swappable..?

Thanks,
SaC

Re: Hot-Swapable or not????

Court Campbell — Tue, 03 Jul 2007 11:54:17 GMT

SMART does not equal hot-swap. Here is info on SMART if you are interested in reading it:

http://en.wikipedia.org/wiki/Self-Monitoring,_Analysis,_and_Reporting_Technology

What king of machine do you have?

Re: Hot-Swapable or not????

Sac_3 — Tue, 03 Jul 2007 11:57:37 GMT

System : ProLiant DL360 G3
ROM version : P31 01/28/2004
iLo present : Yes

Processor: 0
Name : Intel Xeon
Stepping : 9
Speed : 3066 MHz
Bus : 533 MHz
Socket : 2
Level2 Cache : 512 KBytes
Status : Ok

Processor: 1
Name : Intel Xeon
Stepping : 9
Speed : 3066 MHz
Bus : 533 MHz
Socket : 1
Level2 Cache : 512 KBytes
Status : Ok

Re: Hot-Swapable or not????

Court Campbell — Tue, 03 Jul 2007 12:02:40 GMT

The specs of the server say that the drives are hotplug not hot-swap. Usually means you can add disks, but not hot swap disks. So my answer would be that the disk is not hot-swappable.

Re: Hot-Swapable or not????

Rob Leadbeater — Tue, 03 Jul 2007 12:05:19 GMT

Hi,

A DL360 G3 has a SmartArray 5i controller as standard. Assuming your server just has the one controller, then you should be able to see the configuration by doing:

# cat /proc/driver/cciss/cciss0

Hope this helps,

Regards,

Rob

Re: Hot-Swapable or not????

Steven E. Protter — Tue, 03 Jul 2007 13:07:02 GMT

Shalom,

SMART does not stand for hot swappable. However if you configure the SMART card for raid 1 and have two members in the raid set, the disk is indeed hot swapable, if you refer to the disk that has the handle and can be popped in and out of the server.

If you set up raid 0, then realistically you don't have anything thats hot swapable because more than likely the loss of a disk or pulling out of of the raid 0 member will halt the system instantly.

SEP

Re: Hot-Swapable or not????

Sac_3 — Tue, 03 Jul 2007 13:13:42 GMT

Thx for the detailed Answer.

Re: Hot-Swapable or not????

Court Campbell — Tue, 03 Jul 2007 13:25:40 GMT

According to:

http://www.thesml.com/resultsCSR.htm?prodSeriesId=316558&MEID=52D62CB6-837E-4732-8395-CAC479B7735C

on the service preparation page. You do not need to power off the server to replace hot-plug hard drives or power supplies that are not in active use.

I hope that helps. I wish they would just call the drives hot-swappable instead of hotplug.

Re: Hot-Swapable or not????

Rob Leadbeater — Tue, 03 Jul 2007 14:05:04 GMT

Hi,

> I wish they would just call the drives hot-swappable instead of hotplug.

I doubt that's likely to happen. Think of the consequences to HP if all relevant components were labelled as Hot-Swap.

Customer gets sent a replacement disk and thinks its OK to swap it out, without first checking that the drive is indeed part of a mirror or raidset... lawsuits here we come !

Cheers,

Rob