[K12OSN] hard drive SCSI vs IDE-opinions

Nick Hadgis nick.hadgis at gmail.com
Wed Dec 21 17:28:30 UTC 2005

If I'm reading this correctly your mail server scanning internal email for
spam/viruses. Is there anyway to disable spam/virus checks for internal
email? Sounds like this is causing  your performance issue.

If your client virus definitions are kept up to date there's not much of a
risk of viruses spreading via email. If anyone within your organization is
sending spam to other internal users, then a proverbial smack on the side of
the head should fix the problem.

This is what we did at my last comany. We had 2 SMTP servers which handled
internet email, scanning incoming internet email for spam & viruses, but
only scanned internet outbound email for virues. Internal email was not
scanned, we never had an issue with viruses spreading via internal email.

user1 at yourdomain -> user2 at yourdomain - not scanned for viruses or spam
user1 at yourdomain -> user at someinternetaddress - scanned for viruses only
user at someinternetaddress -> user1 at yourdomain - scanned for viruses and spam


On 12/21/05, cisna-barry at wc235.k12.il.us <cisna-barry at wc235.k12.il.us>
> Hello List,
> I was wanting to get opinions on the performance increase of going from
> IDE to SCSI.interface. I've never had to worry much about this till
> recently.
> This school year I set up,,our own mail server (
> Postfix/Dovecot/Squirrelmail/amavisd/clamav),, [works like a charm].. and
> now that we have all staff members using it,we are running into the
> following scenario.
> The three secretaries mass email out dailey announcements( about 350
> users). So,, after they mass email it pulls down the email server for
> almost 10 mins.to were it is unaccessable.So hence as soon as this
> happens,,,phone rings>>"email is down yada,,yada".
> Actually it is only unaccesable for 30 mins,,out of the entire day,,,but
> non the less i hear about it:(..
> I can see at the server the HD is running non-stop for this 10 minute time
> frame processing the outgoing emails.
> Ive tryed to encourage the secs..to just copy/paste,,announcments into the
> message body,,so as to not have attachemnts for the server to scan..but
> not gonna happen,,i dont think.
> This server does have onboard SCSI(promise) i beleive, but for some reason
> ( at the time),,I could not  get K12LTSP to install correctly with
> SCCI,,enabled,,so i just cabled to the IDE interface.
> What will I be up against if ( over xmas vacation)if  i merelry recable
> the HD's to the SCSI interface/enable onboard SCSI, and reboot the box. Im
> guessing im going to not be bootable,,with out manually reconfiguring GRUB
> somehow?:(.
> The server is:
> 1 gig single processor/Intel ,2 gig ram( maxed), dual 120 gig Hds
> 10/100 nics onboard, promise onboard SCSI TX-100( i think).
> I did run the linux disk access utilty on each drive but can remember what
> the numbers/speed were on this?
> If i attempt this,does anyone think this will resolve this "pull down to
> nothing" situation,,of the server /
> I know there are values that can be altered,,in Postfix,,as far as max
> processes,,etc,,,but Id like to leave these at defaults.
> I'm sure someone out there has run into this same snafoo..
> Thanks for any input,,,
> Barry
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