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From: Thorn <Raptor@Etruscan.Warrior>
Subject: Re: Quick question about changing bios from legacy to 'sata'?
References: <PM_2f.923$Zv5.689@newssvr25.news.prodigy.net> <slrndkq9ue.iet.Raptor@Western.Migration> <5Ja3f.718$q%.580@newssvr12.news.prodigy.com>
Message-ID: <slrndks3gb.bac.Raptor@Western.Migration>
Date: Thu, 13 Oct 2005 07:32:30 GMT
On Wed, 12 Oct 2005 16:20:17 GMT, ANC Cried: Read These Runes!:
> THANK YOU for your reply. I can't seem to find the answer anywhere!
>
> I checked the .config and it is commented out:
>
> # CONFIG_BLK_DEV_IDE_SATA is not set
Make sure you have scsi/scsi_generic/low level driver for your chipset
configured. Probably CONFIG_SCSI_ATA_PIIX=y, same as here.
> Two major questions.
>
> 1. If I change bios to 'sata' is it likely that I could wipe out data, or
> damage mbr? Seems to me it just would not boot, but I'm not expert.
Not in my experience. Sata tells the bios how to handle the hardware.
Nothing should be writing to the mbr or changing the fs structure.
> 2. If it boots will my drives run considerably faster than in 'legacy' mode?
> (I assume it will be able to read data written in legacy mode.)
IIRC SATA is UDMA=150, whereas "legacy" UDMA=100/133, so yes your drives
will be moderately faster.
Since your drives are already being detected as /dev/sd* there should be no
detection problems at bootup. If there is, you can specify the root=device
at the boot command prompt. Of course a boot disk is always nice to have.
Thorn
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