From mboxrd@z Thu Jan  1 00:00:00 1970
From: quanstro@quanstro.net (erik quanstrom)
Date: Sat, 19 Mar 2011 16:29:36 -0400
Subject: [9fans] New venti install won't boot after 05:00 crash
In-Reply-To: <83d2253e2e295285fbe8ce76f4c6a811@gmx.de>
References: <83d2253e2e295285fbe8ce76f4c6a811@gmx.de>
Message-ID: <3c882c52eef60ce9a11e800bebd0ede3@brasstown.quanstro.net>
Topicbox-Message-UUID: bd935c0a-ead6-11e9-9d60-3106f5b1d025

On Sat Mar 19 12:36:31 EDT 2011, cinap_lenrek at gmx.de wrote:

> how did the lba48 bug affect the translation of linear byte offsets
> exactly?

the fix means that the transition to 48-bit addressing happens
1 sector sooner.

the reason for this is when the size of a device is reported, the
max lba + 1 is reported, not the maximum lba.  thus a 28-bit
device reporting fffffff would not be able to address sector
fffffff; the last addressable sector would be ffffffe.

- erik