RE: ATA mirroring solution required

2003-10-22 Thread Brent Wiese
 
> I was looking for a secondary controller to give each drive it's own
> channel on the controller (ie a promise/HPT one) but have no 
> experience
> with these under FreeBSD.  Can someone recommend one if possible that
> works flawlessly or an alternative solution?

I have a Promise TX2000 running under 4.8 and it works fine so far. That
card is about $75 online.

One of the nice things is you can tell it to mirror the original drive so
you don't have to reinstall. Other cards (like the 3Ware Escalades) kill
both drives data when you create the mirror, so you have to
reinstall/restore backup.

Cheers,
Brent


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Re: ATA mirroring solution required

2003-10-21 Thread Thomas Spreng
hello,

On Tue, Oct 21, 2003 at 10:47:36PM +0100, Chris Smith wrote:
> Hi,
> 
> Got a bit of a sticky situation.  I have a bog standard Compaq AP230
> workstation with two IDE channels and 3 devices so far (two CDROM
> devices and a hard disk).  I want to add a second disk as a software
> RAID1 mirror of the primary disk.  I know how to do this in FreeBSD so
> thats not a problem - the hardware side is.
> 
> The only available IDE port I have would be shared with the existing
> hard disk i.e two hard disks in RAID1 on the primary IDE chain.  AFAIK
> this is bad for performance reasons.
 
yes you are right. Its very recommended to have only one disk per
IDE/ATA channel since it can only deal with one request to one device at the
time.

> Drives are both Seagate 7200rpm 40Gb ATA100 and the controller supports
> ATA100 also.  Running 4.8-STABLE.
> 
> Where do I go?
> 
> I was looking for a secondary controller to give each drive it's own
> channel on the controller (ie a promise/HPT one) but have no experience
> with these under FreeBSD.  Can someone recommend one if possible that
> works flawlessly or an alternative solution?
 
I have a very similar setup with a vinum raid, using 4 drives on 2
Promise ATA100 (the cheapest one) controllers. They work flawless.
Just check the hardware notes on freebsd.org. There are several IDE/ATA
controllers that are supported under 4.8-STABLE.

> Solutions must be cheap i.e under 50 UKP as the wife will kill me for
> spending any more ;-)
> 
> Cheers all

cheers,
tom
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RE: ATA mirroring solution required

2003-10-21 Thread Tyler McGeorge
Well, if you're willing to spend some money, getting a hardware
RAID1 2-channel IDE controller would be the way to go.

As a cheaper alternative, I, personally, would change the drive
configuration so that each channel had a HDD master and a CDROM
slave.

Hope this helps,
Tyler McGeorge
...to the rescue...

-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of Chris Smith
Sent: Tuesday, October 21, 2003 2:48 PM
To: [EMAIL PROTECTED]
Subject: ATA mirroring solution required


Hi,

Got a bit of a sticky situation.  I have a bog standard Compaq AP230
workstation with two IDE channels and 3 devices so far (two CDROM
devices and a hard disk).  I want to add a second disk as a software
RAID1 mirror of the primary disk.  I know how to do this in FreeBSD so
thats not a problem - the hardware side is.

The only available IDE port I have would be shared with the existing
hard disk i.e two hard disks in RAID1 on the primary IDE chain.  AFAIK
this is bad for performance reasons.

Drives are both Seagate 7200rpm 40Gb ATA100 and the controller supports
ATA100 also.  Running 4.8-STABLE.

Where do I go?

I was looking for a secondary controller to give each drive it's own
channel on the controller (ie a promise/HPT one) but have no experience
with these under FreeBSD.  Can someone recommend one if possible that
works flawlessly or an alternative solution?

Solutions must be cheap i.e under 50 UKP as the wife will kill me for
spending any more ;-)

Cheers all

--
Chris Smith
http://www.infinitemonkeys.org.uk/

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