gvinum raid5 vs. ZFS raidz

[Scott Bennett]

kpneal at pobox.com wrote:

> On Thu, Aug 07, 2014 at 06:06:19AM -0500, Scott Bennett wrote:
> >      Even just as parity bits, those would amount to only one bit per
> > eight bytes, which seems inadequate.  OTOH, the 520 bytes thing is
> > tickling something in my memory that I can't quite seem to recover, and
>
> Weren't those drives used on the AS/400?

     I never worked with the AS/400 and paid little attention to stuff
about it, so I really don't know.  I had assumed that they used the same
disk drive lines that were used on the mainframes.  IBM kind of abandoned
sectored drives after the 1311 and switched to all count-data|count-key-data
drives, so if the AS/400 used the drives being made at the time the AS/400
made its appearance in the market, then the 520 bytes stuff was in relation
to non-IBM systems.  OTOH, if IBM introduced a new line of drives for the
AS/400, then they could have been sectored drives with 520-byte sectors.


                                  Scott Bennett, Comm. ASMELG, CFIAG
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