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Re: Anybody able to get root on raid ?



On Wed, Jan 16, 2003 at 05:43:06PM +0100, franco.tassone@inwind.it wrote:
> Hi all,^M
> ^M
> I recompiled the kernel 2.4.16 on my Indigo2 just slightly modifying the ..config file coming with the stock kernel, in order to add RAID functionalities. The relevant modules were linked with the kernel itself.^M
> ^M
> #^M
> # Multi-device support (RAID and LVM)^M
> #^M
> CONFIG_MD=y^M
> CONFIG_BLK_DEV_MD=y^M
> CONFIG_MD_LINEAR=m^M
> CONFIG_MD_RAID0=m^M
> CONFIG_MD_RAID1=y^M
> CONFIG_MD_RAID5=y^M
> CONFIG_MD_MULTIPATH=m^M
> CONFIG_BLK_DEV_LVM=m^M
> ^M
> Unfortunatelly the kernel doesn't perform the MD autorun and the /dev/md0 raid entry point can't be mounted.^M
> Anybody got success in doing this ?^M
> Any hint will be greatly appreciated.^M
> ^M

Have you set the partition types to 0xfd ? Are you using a dos partition
table ?

I guess you are using an sgi disklabel - and the sgi code misses the
call into the raid layer in case there is a raid partition.

You might want to try this patch against current 2.4 cvs 

Index: fs/partitions/sgi.c
===================================================================
RCS file: /home/cvs/linux/fs/partitions/sgi.c,v
retrieving revision 1.5
diff -u -r1.5 sgi.c
--- fs/partitions/sgi.c	5 Nov 2001 20:16:21 -0000	1.5
+++ fs/partitions/sgi.c	15 Jan 2003 17:54:56 -0000
@@ -14,6 +14,10 @@
 #include <asm/byteorder.h>
 #include <asm/system.h>
 
+#if CONFIG_BLK_DEV_MD
+extern void md_autodetect_dev(kdev_t dev);
+#endif
+
 #include "check.h"
 #include "sgi.h"
 
@@ -74,6 +78,12 @@
 	for(i = 0; i < 16; i++, p++) {
 		blocks = be32_to_cpu(p->num_blocks);
 		start  = be32_to_cpu(p->first_block);
+
+#if CONFIG_BLK_DEV_MD
+		if (be32_to_cpu(p) == LINUX_RAID_PARTITION) {
+		    md_autodetect_dev(MKDEV(hd->major,*current_minor));
+		}
+#endif
 		if(!blocks)
 			continue;
 		add_gd_partition(hd, current_minor, start, blocks);


Its completely untested (compile wise and i did not run it)

Tell me if it helps.

Flo
PS: Your MUA or MTA is broken and appends CR's at the end of all lines.
-- 
Florian Lohoff                  flo@rfc822.org             +49-5201-669912
                        Heisenberg may have been here.

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