This patch is based on the md.c that shipped with the 2.2.11 kernel; it
calls md_stop() on all RAID partitions still around at shutdown/reboot
time, which allows one to have a small (non-RAID) /boot partition with
a kernel on it and a larger (RAID1) partition that's /.
I'm a bit paranoid, so I've got the following setup:
raidboot safeboot
/dev/sda1 : 128MB: /safefs /
/dev/sdb1 : 128MB: swap swap
/dev/sda2 : 8.5GB: (RAID1) / -
/dev/sdb2 : 8.5GB: (RAID1) / -
and a lilo.conf that looks like:
map=/boot/map
vga=normal
delay=20
image=/boot/bzImage.safe
label=Linux-safe
read-only
root=/dev/sda1
image=/boot/bzImage.md
label=Linux-md
append="panic=60 md=0,1,4k,0,/dev/sda2,/dev/sdb2"
read-only
root=/dev/md0
As part of its rc scripts, the raidboot config runs lilo -R Linux-md.
As part of its rc scripts, the safeboot config runs ckraid on the md
device (and sends email saying it had a problem).
Hope someone else finds this useful...
--pj
*** /usr/src/linux-2.2.11/drivers/block/md.c Sat Oct 31 12:37:14 1998
--- /usr/src/pjz-2.2.11/drivers/block/md.c Wed Sep 8 00:36:33 1999
***************
*** 64,69 ****
--- 64,74 ----
#include <asm/atomic.h>
#ifdef CONFIG_MD_BOOT
+ #include <linux/notifier.h>
+ #include <linux/reboot.h>
+ static int md_halt(struct notifier_block *nb, ulong event, void *buf);
+ struct notifier_block md_notifier_block = { md_halt, NULL, 0 };
+
extern kdev_t name_to_kdev_t(char *line) __init;
#endif
***************
*** 1267,1277 ****
"Recompile the kernel with striped mode enabled!\n");
#endif
break;
! /* not supported yet
case 1:
pers = RAID1;
printk ("md: Setting up md%d as a raid1 device.\n",minor);
break;
case 5:
pers = RAID5;
printk ("md: Setting up md%d as a raid5 device.\n",minor);
--- 1272,1288 ----
"Recompile the kernel with striped mode enabled!\n");
#endif
break;
!
case 1:
pers = RAID1;
+ #ifdef CONFIG_MD_MIRRORING
printk ("md: Setting up md%d as a raid1 device.\n",minor);
+ #else
+ printk ("md: Mirroring mode not configured."
+ "Recompile the kernel with mirroring (raid1) mode enabled!\n");
+ #endif
break;
+ /* not supported yet
case 5:
pers = RAID5;
printk ("md: Setting up md%d as a raid5 device.\n",minor);
***************
*** 1348,1356 ****
--- 1359,1390 ----
}
#ifdef CONFIG_MD_BOOT
+
+ static int md_halt(struct notifier_block *nb, ulong event, void *buf)
+ {
+ int i;
+
+ if (!(event == SYS_RESTART || event == SYS_HALT || event == SYS_POWER_OFF))
+ return NOTIFY_DONE;
+
+ /* stop all the RAID devices */
+
+ for (i=0; i<MAX_MD_DEV; i++)
+ {
+ if (md_dev[i].pers) {
+ do_md_stop(i, md_dev[i].devices[0].inode);
+ }
+ }
+
+ unregister_reboot_notifier(&md_notifier_block);
+ return NOTIFY_OK;
+ }
+
__initfunc(void md_setup_drive(void))
{
if(md_setup_args.set)
do_md_setup(md_setup_args.str, md_setup_args.ints);
+
+ register_reboot_notifier(&md_notifier_block);
}
#endif
