SUMMARY: need to replace hard drive in ultra 1

From: Oscar Knight <>
Date: Tue Aug 20 2002 - 14:24:58 EDT
Hello Everyone,

Short Version of my quesion: need to replace an (external) hd on an
Ultra 1.  I forgot to mention that it was external in the original

Summary:  The answers were GREAT, and fast. THANKS!  In short I _think_
all the drives I listed _should_ work.  The only real concern is HEAT.
I failed to mention that this was a disk in an external case.  So, in
this case heat will not be a concern.  I will recommend the ST318438LW,
the 7200rpm unit.  It's cheaper and will generate less heat.

There's lots of good info in the replies, including a pointer to sun
supported drives.  I've listed the original message with the replies

Special thanks to  Hichael Morton, Allan West, and Dirk Jansen for
their replies.

Oscar D. Knight                           
Network Support Services                              Voice: 828-262-6946
Appalachian State University, Boone, NC 28608           FAX: 828-262-2236

Original Post
> Date: Tue, 20 Aug 2002 12:15:29 -0400 (EDT)
> From: Oscar Knight <>
> To:
> Subject: need to replace hard drive in ultra 1
> Hello Everyone,
> I'm trying to assist someone with an Ultra 1 box.  They had a HD failure,
> an ST39173W, Seagate Barracuda.  I can't find an ST39173W to replace it.
> It has a 68pin connector.  They are running Solaris 7.
> If anyone can answer ANY of the following it would be helpful.
>   Can anyone suggest an 18Gig, ...  that will work?
>   Will a  ST318406LW  Seagate 18.4GB 10Krpm Cheetah  work?
>   Will a  ST318438LW  Seagate 18.4GB 7.2Krpm Barracuda  work?
>   Will a  ST318452LW  Seagate 18.4GB 15Krpm Cheetah  work?
>   Will a  ST336706LW  Seagate 36.9GB 10Krpm Cheetah  work?
>     (BTW, I'm not hung-up on Seagate, I just researched the old drive
>      and  then picked Seagate drives that I thought would work.)
>   Can anyone indicate what the general requirements are for a replacement
>   drive?
> THANKS in advance,
> odk
> --
> Oscar D. Knight                           
> Network Support Services                              Voice: 828-262-6946
> Appalachian State University, Boone, NC 28608           FAX: 828-262-2236


> Date: Tue, 20 Aug 2002 09:44:36 -0700 (PDT)
> From: Hichael Morton <>
> To: Oscar Knight <>
> Subject: Re: need to replace hard drive in ultra 1
> You should check your hard drive.  The original drives for Ultra1's
> were 80-pin, SCA hard drives NOT 68-pin hard drives.
> The ST39173WC will work as will the other WC drives.  All of these have
> an 80-pin, SCA connector.
> is a good place to "pick-up" SCA hard drives (new and used;
> Sun, Seagate, IBM, Fujitsu, etc.).  My preference is Sun or Seagate.
> Date: Tue, 20 Aug 2002 13:17:28 -0400
> From: Allan West <>
> To: Oscar Knight <>
> Subject: Re: need to replace hard drive in ultra 1
> I'm assuming you're talking about the internal drive bay of the
> Ultra-1...
> Ultra-1's generally have an 80-pin connector, not 68-pin, since the
> drives connect using the hot-swap brackets similar to the server line.
> I've bought 18GB Seagate drives and swapped them with no problem. The
> requirements are:
> a) 1" high, also called 1/3 height or low-profile, often Seagate
>    model numbers ending in "LC"
> b) 80-pin connector which carries 68-pin SCSI as well as SCSI ID
>    selector and power to the drive
> I buy my drives from and most of the
> time.  BasonComputer has relatively helpful staff. When you get the new
> drive, just put it in the bracket the current drive is in and pop it
> back into the machine.
> I find Seagate drives reliable. You won't want to put more than one hard
> drive inside the machine if you go with 18GB or greater, since the case
> isn't rated for the heat load.
> I can't comment on any of the models you listed because I don't have the
> conversion to physical characteristics, but I'd get a 7200 RPM drive
> unless you're running a database or similar high-access usage. They're
> cheaper, and still faster than the original 5400 RPM drives.
> Let me know if you have any questions about this information. Allan
> Date: Tue, 20 Aug 2002 19:16:10 +0200 (MEST)
> From: Dirk Jansen <>
> To:
> Subject: Re: need to replace hard drive in ultra 1
> Hi Oscar,
> Officially, none of those is supported (but the 9Gb that was inside is
> also not supported)
> I would go for the ST318438LW (because it's a 7.2Krpm) and I think
> it won't get as hot as the 10Krpm disks.
> You can find a list of supported disks for the ultra1 on:
> click on: "Sun System Handbook" (on the left)
> click on: "Systems"
> Then select your system and you will get a list of supported components.
> The biggest supported one for ultra1 is 4Gb.
> I think they don't support bigger disks because of temperature issues.
> You also may not be able to boot of a single 18Gb partition.
> Best regards,
> Dirk
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