Hi,
We use GRML as rescue system on our machines. The /boot partition (which sits
on a software raid1) of the main system includes the GRML-Kernel, initrd and
squashfs so in case someone unintentionally removes libc6 or does some other
bad things it's possible to recover the machine via the grml boot option in
grub.
the good thing is that this works if the /boot partition is on ide devices
because the ide drivers are compiled into the kernel and the raid code in the
kernel autostarts the raid.
the bad thing: it doesn't work with our new dell boxes with mpt fusion
controllers. the second problem here is that these boxes don't have ps/2
keyboard connectors and grml doesn't recognise the usb keyboard when it puts
me into the rescue shell ... argh.
here is what i did to fix these problems:
- when grml loads the usb kernel modules it also tries to insmod usbhid.ko but
this one has unknown symbols because ff-memless.ko has to be loaded first. so
i copied ff-memless.ko to the initrd and added it to the list of usb.modules.
cool. now i have a keyboard.
- the next thing was that the sysfs-scsi-detection code did not find my fusion
mpt controller. after reading /modules/scsi/scsi-modules.txt i knew why:
because it was missing from there. after adding the entries for it i ended
with a correctly detected controller but without a raid. how is the
scsi-modules.txt file created? by hand? maybe it would be better to generate
it from /lib/modules/$(uname -r)/modules.{dep,pcimap} because in these files
the mpt drivers where referenced ...
- ok so after having the devices i needed to start the raid1 to access the
filesystem. unfortunately there is no mdadm in the initrd image of grml so i
had to compile a static version of mdadm and put it in /static. after this i
added some code to assemble all arrays in case there exists a boot option
fromhd=/dev/md*
ok so now everything works. great!
btw: grml is a really cool tool
cheers,
--
: Philipp Richter Tel +43-1-8178292-51 :
: LINBIT Information Technologies GmbH Fax +43-1-8178292-82 :
: Vivenotgasse 48, A-1120 Vienna/Europe http://www.linbit.com :
--- m1/linuxrc 2007-05-12 12:54:30.000000000 +0200
+++ m2/linuxrc 2007-08-21 16:45:06.000000000 +0200
@@ -597,6 +597,13 @@
test -n "$FOUND_SCSI" -a -z "$NOSCSI" && DEVICES="$DEVICES /dev/sd?[1-9] /dev/sd?[1-9][0-9] /dev/sd?"
DEVICES="$DEVICES /dev/hd?[1-9] /dev/hd?[1-9][0-9]"
case "$CMDLINE" in *fromhd=/dev/*) DEVICES="$fromhd"; ;; esac
+ # start raid arrays if we depend on it
+ case "$DEVICES" in */dev/md*)
+ echo "DEVICE partitions" > /etc/mdadm.conf
+ /static/mdadm -Ebs >> /etc/mdadm.conf
+ /static/mdadm -Asayes
+ ;;
+ esac
# make sure we dont' search for the booting device if cdrom=... is present
case "$CMDLINE" in *cdrom=/dev/*)
CDROMDEV="$(echo $CMDLINE | tr ' ' '\n' | sed -n '/cdrom=/s/.*=//p' | tail -1)"
--- m1/modules/scsi/scsi-modules.txt 2007-05-04 08:57:34.000000000 +0200
+++ m2/modules/scsi/scsi-modules.txt 2007-08-21 11:08:51.000000000 +0200
@@ -566,3 +566,33 @@
v00009005d0000809Esv*sd*bc01sc04i* aic79xx
v00009005d0000809Fsv*sd*bc01sc00i* aic79xx
v00009005d0000809Fsv*sd*bc01sc04i* aic79xx
+v00001000d00000050sv*sd*bc01sc00i* mptbase mptscsih mptsas
+v00001000d00000050sv*sd*bc01sc04i* mptbase mptscsih mptsas
+v00001000d00000054sv*sd*bc01sc00i* mptbase mptscsih mptsas
+v00001000d00000054sv*sd*bc01sc04i* mptbase mptscsih mptsas
+v00001000d00000056sv*sd*bc01sc00i* mptbase mptscsih mptsas
+v00001000d00000056sv*sd*bc01sc04i* mptbase mptscsih mptsas
+v00001000d00000058sv*sd*bc01sc00i* mptbase mptscsih mptsas
+v00001000d00000058sv*sd*bc01sc04i* mptbase mptscsih mptsas
+v00001000d00000062sv*sd*bc01sc00i* mptbase mptscsih mptsas
+v00001000d00000062sv*sd*bc01sc04i* mptbase mptscsih mptsas
+v00001000d00000030sv*sd*bc01sc00i* mptbase mptscsih mptspi
+v00001000d00000030sv*sd*bc01sc04i* mptbase mptscsih mptspi
+v00001000d00000040sv*sd*bc01sc00i* mptbase mptscsih mptspi
+v00001000d00000040sv*sd*bc01sc04i* mptbase mptscsih mptspi
+v00001000d00000621sv*sd*bc01sc00i* mptbase mptscsih mptfc
+v00001000d00000621sv*sd*bc01sc04i* mptbase mptscsih mptfc
+v00001000d00000622sv*sd*bc01sc00i* mptbase mptscsih mptfc
+v00001000d00000622sv*sd*bc01sc04i* mptbase mptscsih mptfc
+v00001000d00000624sv*sd*bc01sc00i* mptbase mptscsih mptfc
+v00001000d00000624sv*sd*bc01sc04i* mptbase mptscsih mptfc
+v00001000d00000626sv*sd*bc01sc00i* mptbase mptscsih mptfc
+v00001000d00000626sv*sd*bc01sc04i* mptbase mptscsih mptfc
+v00001000d00000628sv*sd*bc01sc00i* mptbase mptscsih mptfc
+v00001000d00000628sv*sd*bc01sc04i* mptbase mptscsih mptfc
+v00001000d00000642sv*sd*bc01sc00i* mptbase mptscsih mptfc
+v00001000d00000642sv*sd*bc01sc04i* mptbase mptscsih mptfc
+v00001000d00000640sv*sd*bc01sc00i* mptbase mptscsih mptfc
+v00001000d00000640sv*sd*bc01sc04i* mptbase mptscsih mptfc
+v00001000d00000646sv*sd*bc01sc00i* mptbase mptscsih mptfc
+v00001000d00000646sv*sd*bc01sc04i* mptbase mptscsih mptfc
--- m1/linuxrc 2007-05-12 12:54:30.000000000 +0200
+++ m2/linuxrc 2007-08-21 16:45:06.000000000 +0200
@@ -410,7 +410,7 @@
if test -f /modules/div/usbcore.ko; then
$INSMOD /modules/div/usbcore.ko >/dev/null 2>&1
FOUNDUSB=""
- for i in $USB2 uhci-hcd.ko ohci-hcd.ko usbhid.ko ; do
+ for i in $USB2 uhci-hcd.ko ohci-hcd.ko ff-memless.ko usbhid.ko ; do
test -f /modules/div/$i && $INSMOD /modules/div/$i >/dev/null 2>&1 && FOUNDUSB="yes"
done
if test -n "$FOUNDUSB"; then
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