[Gllug] SCSI Hard Drives

Richard Cottrill richard_c at tpg.com.au
Tue Jan 22 15:39:29 UTC 2002


The only benefit I can see in less platters is perhaps higher density.
Although I suppose the drive could stripe data across platters in some cute
little when-I-grow-up-I-want-to-be-a RAID.

Damn. Rambling again...

Richard
> -----Original Message-----
> From: gllug-admin at linux.co.uk [mailto:gllug-admin at linux.co.uk]On Behalf
> Of tet at accucard.com
> Sent: Tuesday, January 22, 2002 3:28 PM
> To: gllug at linux.co.uk
> Subject: Re: [Gllug] SCSI Hard Drives
>
>
>
> >I also find it a bit odd that the seagate LC uses 80 pins rather than
> >68 and I cannot be arsed looking for adapters.
>
> Nothing odd about it, just different connectors. The Seagate uses an
> SCA2 connector, which integrates power and data, so you only need to
> connect one cable to your drive. Quite why the world didn't go this
> way ages ago is beyond me. Those of us coming from a Unix workstation
> background are continually amazed at how primitive PC hardware is.
> Changing a hard drive on a SPARC is typically a 30 second job. Compare
> that with doing the same on a PC... Some PC servers (e.g., from Dell,
> Compaq, etc.) are starting to use SCA drives, but the mainstream isn't.
>
> BTW, Micro Anvika on TCR sell SCA to 50/68 pin internal SCSI adapters.
> I think the last one I got was 14 quid.
>
> >I also noticed that on the technical pages the equivalent seagates had 4
> >physical heads and two disks whereas the Fujitsu had 2 heads and
> one disk.
> >How does this affect the disk??
>
> Although I haven't checked the specs for these particular drives, more
> platters typically means lower latency.
>
> Tet
>
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