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Bug#769107: debian-installer: grub-installer fails if more than 26 SCSI devices are present

Package: debian-installer
Version: 20141002
Severity: important
Tags: d-i

Dear Maintainer,

installing Debian jessie with weekly snapshot netinst ISO image
on an x86_64 Server with lots of SCSI devices as of 2014-10-29 makes
grub-installer croak. Debugging reveals that it stumbles across SCSI devices
/dev/sda[a-z] being present. Patching it as follows (manually from a separate
console in the install system) makes the installtion proceed without problem:

>From 4d91c83577a4dbe8c52271bbd157b450b8c7edf3 Mon Sep 17 00:00:00 2001
From: Michael Weiser <m.weiser@science-computing.de>
Date: Fri, 31 Oct 2014 11:36:10 +0100
Subject: [PATCH] Allow for devices such as /dev/sdaa

 grub-installer | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/grub-installer b/grub-installer
index 2b61fb6..5bceec6 100755
--- a/grub-installer
+++ b/grub-installer
@@ -252,7 +252,7 @@ case $prefix in
-    /dev/[hsv]d[a-z0-9]|/dev/xvd[a-z]|/dev/cciss/c[0-9]d[0-9]*|/dev/ida/c[0-9]d[0-9]*|/dev/rs/c[0-9]d[0-9]*|/dev/mmcblk[0-9]|/dev/ad[0-9]*|/dev/da[0-9]*)
+    /dev/[hsv]d[a-z0-9][a-z0-9]|/dev/xvd[a-z]|/dev/cciss/c[0-9]d[0-9]*|/dev/ida/c[0-9]d[0-9]*|/dev/rs/c[0-9]d[0-9]*|/dev/mmcblk[0-9]|/dev/ad[0-9]*|/dev/da[0-9]*)

-- System Information:
Debian Release: jessie/sid
  APT prefers testing-updates
  APT policy: (500, 'testing-updates'), (500, 'testing')
Architecture: amd64 (x86_64)

Kernel: Linux 3.16-3-amd64 (SMP w/1 CPU core)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

-- no debconf information
Vorstandsvorsitzender/Chairman of the board of management:
Gerd-Lothar Leonhart
Vorstand/Board of Management:
Dr. Bernd Finkbeiner, Michael Heinrichs, Dr. Arno Steitz
Vorsitzender des Aufsichtsrats/
Chairman of the Supervisory Board:
Philippe Miltin
Sitz/Registered Office: Tuebingen
Registergericht/Registration Court: Stuttgart
Registernummer/Commercial Register No.: HRB 382196

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