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Date:	Fri, 16 Mar 2001 20:50:48 PST
From:	sshapiro@ucsd.edu (Sandy Shapiro)
Reply-To:	scoug-help@scoug.com
To:	scoug-help@scoug.com
Subject:	SCOUG-Help: Re: IDE Tape

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Well, that did the trick. Thank you.
I put a third IDE hard drive as primary on the second IDE channel, made
one big extended partition, and formatted it as HPFS. OS/2 added a drive
letter at the end of the chain.

The backups work fine.

One question. My CD Rom drive is now out of sequence. It's drive letter
got bounced down a notch. Is there a way to set the CD Rom drive letter at
a very low level, like drive Y or Drive Z, so I don't have to keep fooling
with it whenever I add another hard drive?

Thanks,
Sandy

>Sandy Shapiro wrote:
>>
>> If I put another IDE hard drive in place of
>> the tape drive, and I configure it as an HPFS
>> drive, will it screw up my OS/2 drive letters?

>I assume that your two existing hard drives are on the Primary IDE
>channel (one is jumpered as "Master" and the other is jumpered as
>"Slave"), and that your existing tape drive is on the Secondary IDE
>channel and that there's nothing else on that channel.

>In that case, if you remove the tape drive and install a third IDE hard
>drive, and if you only create an Extended Partition on the drive, and
>then create one or more Logical Partitions inside the Extended Partition,
>then your existing drive letters won't change.

>There are two ways to mess up your drive letters. First, if you a
>Primary partition on the new hard drive the drive letters might get out
>of sequence (Primary partitions are given drive letters first, then all
>the disks are rescanned and the Logical partitions are given letters).
>Second, if by chance you have your tape drive on the Primary IDE channel
>as the "Slave" unit and your existing drives are installed and jumpered
>as Primary Master and Secondary Master, then if you install the new hard
>drive as Primary Slave the drive letters will get out of sequence.

>Your first hard drive is almost certainly the Primary Master. If your
>second hard drive is on the same cable and the tape drive is on a
>different cable with nothing else attached to that cable, then you're all
>set.

>Since your second hard drive is "just for Linux" it probably has a
>partition type which OS/2 doesn't recognize and therefore doesn't receive
>an OS/2 drive letter. But someday you might repartition the drive and
>add FAT or HPFS, or OS/2 may someday gain Linux disk partition support.
>To be safe, make sure your new drive is on the Secondary IDE channel and
>is the "Slave" if the Secondary IDE channel already has a "Master" hard
>drive.

>- Peter

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