[mythtv-users] OT? Hardware Differences
jringler at unitedtransport.net
Fri Apr 14 15:45:57 UTC 2006
You might want to check the date on your computer. Your emails are
coming through April 13, 1989
On Thu, 1989-04-13 at 10:25 -0400, R. G. Newbury wrote:
> This is a little offthread but it does affect my use of myth. And this
> list has shown that it is a source of deep knownledge about linux.
> I have 2 exactly similar 40G hard drives: model IC35L040AVVN07-0. Bought
> the same day, same order.
> Playing with hdparm I can set the master /dev/hda to use udma=5 (using
> the -X69 parameter.
> The slave /dev/hdb will only do udma=2.
> As a result, although the cached read speeds are similar at about
> 730MB/s, the buffered read on hdb is 19.6MB.s versus 45 MB/s on hda
> The only difference I can see is that hdb reports:
> AdvancedPM=yes: unknown setting while hda reports AdvancedPM=yes:
> disabled (255), and attempting to set APM on hdb gives the following
> error: HDIO_DRIVE_CMD failed: Input/output error
> It appears that neither APM nor acoustic management features actually
> get changed/set when I use hdparm... Weird!
> I can get/set the other commands/switches on the drive so this is more
> than a little weird.
> I want to move this drive to my mythbox and do the OS install onto it,
> and use the entirety of the present 120G for recording...But the
> throughput problem puts this plan in doubt. Any thoughts anyone.
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