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Conference star::wizards

Title:	"ASK THE WIZARDS"

Moderator:	QUARK::LIONEL

Created:	Mon Oct 30 1995
Last Modified:	Mon May 12 1997
Last Successful Update:	Fri Jun 06 1997
Number of topics:	1857
Total number of notes:	3728

1646.0. "Open: need diskdefragger in RAID 5?" by STAR::JKEENAN () Tue Mar 04 1997 15:21

Date: Tue, 4 Mar 1997 03:57:13 -0500
Message-Id: <[email protected]>
From: "VMS001::WWW"@vms001.das-x.dec.com (04-Mar-1997 0357)
To: [email protected], [email protected], [email protected]
Subject: Ask the Wizard: '[email protected]'

Remote Host: (null)
Browser Type: Mozilla/4.0b2 (Win95; I)
Remote Info: <null>
Name: Hans Svderman
Email Address: [email protected]
CPU Architecture: Alpha
Version: Other
Questions: 

Hi,
We are just installing VMS 7.1 in a Alpha 1000/HSZ50 environment, with
RAID 5  and mirroring.

My question are do we need ( does it work whith )a diskdefragger in RAID 5.
I asked the digital rep who installed the system , but he had no answer.

Thanks in advance

Hasse.

T.R Title User Personal
Name Date Lines

1646.1 Contact Defrag Vendor XDELTA::HOFFMAN Steve, OpenVMS Engineering Fri Mar 07 1997 15:45 20

T.R	Title	User	Personal Name	Date	Lines
1646.1	Contact Defrag Vendor	XDELTA::HOFFMAN	Steve, OpenVMS Engineering	`Fri Mar 07 1997 15:45`	20
	:My question are do we need ( does it work whith )a diskdefragger in RAID 5. :I asked the digital rep who installed the system , but he had no answer. There is no answer... Disk defragmentation tools should be compatible with RAID5, please contact the defragmentation vendor. There are certainly workloads around that do require the use of a disk defragmentation tool, but first determine if you actually have excessive and uncontrollable disk fragmentation... I've seldom seen the need for a defragmentation tool, with appropriate available free space on the disk(s), and with the approrpriate file extension quantities in applications that would tend to fragment the disk, and with an occasional (eg: biannual) disk image BACKUP and restoration operations. (And an occasional disk BACKUP/IMAGE is a good idea regardless of any defragmentationt tool...)

:My question are do we need ( does it work whith )a diskdefragger in RAID 5.
:I asked the digital rep who installed the system , but he had no answer.

   There is no answer...

   Disk defragmentation tools should be compatible with RAID5, please
   contact the defragmentation vendor.

   There are certainly workloads around that do require the use of a disk
   defragmentation tool, but first determine if you actually have excessive
   and uncontrollable disk fragmentation...

   I've seldom seen the need for a defragmentation tool, with appropriate
   available free space on the disk(s), and with the approrpriate file
   extension quantities in applications that would tend to fragment the
   disk, and with an occasional (eg: biannual) disk image BACKUP and
   restoration operations.  (And an occasional disk BACKUP/IMAGE is a
   good idea regardless of any defragmentationt tool...)