On Thu, 10 Aug 2000, Bill Davidsen wrote:
>> If I buy an IDE card I don't just want a low end card, I want
>> something that will allow me to get full benefit from NEW
>> hardware. That calls for an Ultra100 or something. If all you
>> want is another IDE interface I'm sure it is cheap enough. I
>> don't want to spend $10 on an IDE interface that just gets me an
>> extra IDE port. If I spend money I want to put it towards
>> something worth an upgrade for. An Ultra100 would allow me to
>> buy and use new Ultra 100 drives to their potential and would be
>> worth it.
>
>It's your money, but I miss any reason to go to SCSI for CD, since the
>ATAPI devices cost less for any given performance, and as long as you
>put each CD device on a separate controller you avoid the evils of the
>bus. The money you save on not buying new SCSI CD drives would go to
>buying disk or something which might work better on SCSI.
Sorry again... ;o) You are right WRT $$$ for using SCSI for
CDROMS solely. I wasn't meaning that I was going to rush out and
get a new CD writer and reader. I meant getting SCSI perhaps
when the reader or writer fails, or when I'm ready for a new hard
disk. I won't be tossing any existing hardware. Once I plan on
buying any new piece of new hardware that is avail in SCSI for
reasonable price difference, and I can afford it, I'll get a SCSI
card. After that, I'll gradually migrate to SCSI as I upgrade
dead peripherals or just feel the need to upgrade.
Again, this is for my own purposes, not general advice.
>I'm told that in the next year or so ATAPI will be upgraded to
>allow disconnect-reconnect and support more devices than two
>(but it's 16). Since ATA100 already added CRC on the transfers,
>the advantages of SCSI grow very small except at the very top
>end.
This is all true I believe as well. I've also heard ATA will
allow devices like scanners, etc.. I've yet to see it
though. If ATA/IDE gets these new features then it could well
keep me using ATA/IDE devices if the price is right and the
features are there too.
>The big advantage of SCSI comes when you need a lot of drives, and I
>would never deny that. But for home use I would put the dollars into
>memory, CPU, and a really good backup system. That's my opinion, as I
>said it's your money, if SCSI makes you happy go for it. I use parity
>memory to feel good, I understand running the best for some things.
Oh I understand completely. SCSI wont do squat for speed on a
home system like mine. Not unless RAID'd pointlessly. It does
give the other cool advantages of multiple devices though,
including non disks, and frees one of the IDE limitations and
Oops, etc...
>Related topic: has anyone ever tried running an ATAPI drive with the
>Linux ide-scsi driver?
Certainly. My CD writer uses it since 2.2.0, and also 2.0.31-36
before that. My reader also used it until I figured out how to
tell the kernel to use ide-cd for the reader.
ide-scsi sucks for CD readers as not everything seems to work
right. I can't remember the specifics though...
Here is how I tell it what to do:
boot=/dev/hda6
map=/boot/map
install=/boot/boot.b
prompt
timeout=50
image=/boot/bzImage-2.2.16-1NS
label=linux
read-only
vga=ext
root=/dev/hda6
append="hdc=ide-scsi hdd=ide-cd"
--
Mike A. Harris Linux advocate
Computer Consultant GNU advocate
Capslock Consulting Open Source advocate
Try out Red Hat Linux today: http://www.redhat.com
ftp://ftp.redhat.com/pub/redhat/redhat-6.2/
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