linux-kernel - Re: What still uses the block layer?

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Message-ID: <20071016224925.07d28c48@the-village.bc.nu>
Date:	Tue, 16 Oct 2007 22:49:25 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	david@...g.hm
Cc:	Matthew Wilcox <matthew@....cx>,
	Stefan Richter <stefanr@...6.in-berlin.de>,
	Rob Landley <rob@...dley.net>,
	David Newall <david@...idnewall.com>,
	linux-kernel@...r.kernel.org, linux-scsi@...r.kernel.org,
	Suparna Bhattacharya <suparna@...ibm.com>,
	Nick Piggin <piggin@...erone.com.au>
Subject: Re: What still uses the block layer?

> but in any case, historicly IDE (PATA) and SATA drives have been handled 
> differently, IDE drives have had fixed device names based on how they are 
> connected, SATA devices have had 'order found' device names from the SCSI 

Nope.

Historically it depended whether you had a PATA controller with SATA
bridge, a SATA controller with SATA drives, a PATA controller with PATA
drives or a SATA controller with PATA bridge.

Often the bridges are on the card or mainboard. So some VIA systems would
historically use /dev/hda for the first SATA device.

Even more fun is stuff like Jmicron where the BIOS settings determined
whether PATA or SATA was /dev/hda

Alan
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