Date: Mon, 17 May 1999 22:04:44 +0200 (SAST) From: Robert Nordier <rnordier@nordier.com> To: adepoo@tamnet.com.mx (Alberto de Poo Bas) Cc: rnordier@nordier.com (Robert Nordier), stable@freebsd.org Subject: Re: disk error Message-ID: <199905172004.WAA07125@ceia.nordier.com> In-Reply-To: <Pine.BSF.3.96.990516215642.19677B-100000@correo.tamnet.com.mx> from Alberto de Poo Bas at "May 16, 1999 10:01:47 pm"
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Alberto de Poo Bas wrote:
> Thanks, that explain a lot, because some other disk don't have this
> problem but the geometry was diferent (like 787 cyl, 255 heads, 63
> sectors).
>
> Other question, the geometry on an IDE disk can affect the performance or
> break something? This is because the above mentioned disk, to change the
> values to what they say in the case.
There should be no performance difference (and, as far as most 32-bit
OSes are concerned, the BIOS geometry tends to be used only while
booting, anyway). As far as breaking something: changing the geometry
will quite likely mess up your fdisk partition table ("slice table"
in FreeBSD terminology). Each slice has a cylinder, head, sector
(CHS) starting address and, if the geometry is changed, the CHS
values won't necessary resolve to the same block address.
--
Robert Nordier
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