11 Sep
2012
11 Sep
'12
7:03 p.m.
From: Dave McGuire
Sent: Monday, September 10, 2012 10:28 PM
On 09/11/2012 12:51 AM, John Foust wrote:
> At 11:09 PM 9/10/2012, Dave McGuire wrote:
>> He's absolutely clueless. Drives used in EMC storage arrays, for
>> example, which usually contain hundreds of drives, are usually (perhaps
>> always) formatted to 576 bytes/sector.
>
> Extra bytes for sector-level error correction, interpreted outside
> of the drive's own hardware?
AFAIK it's used for externally-handled ECC.
I typed 576 bytes above; I meant 520 bytes. I'm
sitting in a hotel at
the moment, pretty tired from driving, that's my excuse. ;)
576 sounded fine to me. After all, it's what was used on RA-81 drives
when connected via CFS to KL-10 systems with the CI option installed.
Rich Alderson
Vintage Computing Sr. Systems Engineer
Vulcan, Inc.
505 5th Avenue S, Suite 900
Seattle, WA 98104
mailto:RichA at vulcan.com
mailto:RichA at LivingComputerMuseum.org
http://www.LivingComputerMuseum.org/