[dba-SQLServer] External hard disk

John W. Colby jwcolby at colbyconsulting.com
Thu Aug 19 21:49:21 CDT 2004


I purchased a "mobile disk" external hard disk enclosure from CompUSA to put
one of the 200gb hard disks in so I could take the db with me and work off
my laptop.  I found a diag program out there somewhere that tested the
transfer speed.  For USB 2.0 the transfer speed was ~25 mbyte / sec.  For
fire wire (4 pin) it was only 17.5 mbyte / sec.  This with the Maxtor 200g
8mb cache.

John W. Colby
www.ColbyConsulting.com 

-----Original Message-----
From: dba-sqlserver-bounces at databaseadvisors.com
[mailto:dba-sqlserver-bounces at databaseadvisors.com] On Behalf Of Michael
Maddison
Sent: Thursday, August 19, 2004 7:44 PM
To: dba-sqlserver at databaseadvisors.com
Subject: RE: [dba-SQLServer] Block size for SQL Server disk


Most of the recommendations for sector size say bigger is better.  I have a
ppt presentation from UNISYS that looks at all the options for setting up a
SQL server box.  IIRC they recommend 64K because it allows the fastest file
growth.

While SQL uses 8k page sizes I'm not sure that relates directly to sector
size!

If anyone wants a copy of the ppt lemme know.

cheers

Michael M


On Thu, 19 Aug 2004 16:01:05 -0400, John W. Colby
<jwcolby at colbyconsulting.com> wrote:
> I have purchased new disks to build this new SQL Server database on.
> I believe I have read that SQL Server uses 8k block sizes internally.

> Is it useful to format the hard disk to 8K sectors so that the SQL
> blocks map to sectors directly?  Does anyone know if this helps or 
> hinders?

Although Sql Server uses 8k block sizes internally I've never heard on any
list that it's a good idea to format your hdd that way... so I'd say nope.

-- 
-Francisco
_______________________________________________
dba-SQLServer mailing list
dba-SQLServer at databaseadvisors.com
http://databaseadvisors.com/mailman/listinfo/dba-sqlserver
http://www.databaseadvisors.com

_______________________________________________
dba-SQLServer mailing list
dba-SQLServer at databaseadvisors.com
http://databaseadvisors.com/mailman/listinfo/dba-sqlserver
http://www.databaseadvisors.com







More information about the dba-SQLServer mailing list