[CentOS] Grub, pata, and sata

[David G. Mackay]

On Tue, 2010-11-23 at 22:17 +0100, Tru Huynh wrote:
> On Tue, Nov 23, 2010 at 01:04:03PM -0600, David G. Mackay wrote:
> > 
> > (parted) print
> > all                                                        
> > 
> > Model: Hitachi HDT725032VLAT80 (ide)
> > Disk /dev/hda: 320GB
> > Sector size (logical/physical): 512B/512B
> > Partition Table: msdos
> > 
> > Number  Start   End    Size   Type     File system  Flags
> >  1      32.3kB  107MB  107MB  primary  ext3         boot 
> >  2      107MB   320GB  320GB  primary               lvm  
> > 
> > 
> > 
> > Model: WDC WD450AA-00BAA0 (ide)
> > Disk /dev/hdb: 45.0GB
> > Sector size (logical/physical): 512B/512B
> > Partition Table: msdos
> > 
> > Number  Start   End     Size    Type     File system  Flags
> >  1      32.3kB  107MB   107MB   primary  ext3         boot 
> >  2      107MB   45.0GB  44.9GB  primary               lvm  
> > 
> > 
> > 
> > Model: ATA SAMSUNG HD502HI (scsi)
> > Disk /dev/sda: 500GB
> > Sector size (logical/physical): 512B/512B
> > Partition Table: msdos
> > 
> > Number  Start   End    Size   Type     File system  Flags
> >  1      32.3kB  105GB  105GB  primary  ext3         boot 
> >  2      105GB   500GB  395GB  primary  ext3              
> >  3      500GB   500GB  107MB  primary  ext3              
> > 
> > 
> > Error: Unable to open /dev/md0 - unrecognised disk
> > label.                 
> 
> shouldn't have boot,raid flags on the members of tour /dev/md0 array?
> 
> cat /proc/mdstat 
> df -P
> cat /grub/grub.conf (from hda1) and from hdb1

[root at vorpal ~]# cat /proc/mdstat 
Personalities : 
unused devices: <none>
[root at vorpal ~]# df -P
Filesystem         1024-blocks      Used Available Capacity Mounted on
/dev/sda1             99188468   4853368  89215188       6% /
/dev/sda2            373793320 235981428 118517828      67% /home/dave
/dev/hda1               101086     25176     70691      27% /boot
/dev/sda3               101105      5665     90219       6% /boot2
tmpfs                   647588         0    647588       0% /dev/shm
/dev/hdc               4087030   4087030         0
100% /media/CentOS_5.5_Final

[root at vorpal ~]# cat /boot/grub/grub.conf
# grub.conf generated by anaconda
#
# Note that you do not have to rerun grub after making changes to this
file
# NOTICE:  You have a /boot partition.  This means that
#          all kernel and initrd paths are relative to /boot/, eg.
#          root (hd0,0)
#          kernel /vmlinuz-version ro root=/dev/sda1
#          initrd /initrd-version.img
#boot=/dev/hda
default=0
timeout=5
splashimage=(hd0,0)/grub/splash.xpm.gz
hiddenmenu
title CentOS (2.6.18-194.26.1.el5)
        root (hd0,0)
        kernel /vmlinuz-2.6.18-194.26.1.el5 ro root=LABEL=/ rhgb quiet
psmouse.proto=bare
        initrd /initrd-2.6.18-194.26.1.el5.img

Following is boot from hdb
[root at vorpal ~]# cat /mnt/util/grub/grub.conf
# grub.conf generated by anaconda
#
# Note that you do not have to rerun grub after making changes to this
file
# NOTICE:  You have a /boot partition.  This means that
#          all kernel and initrd paths are relative to /boot/, eg.
#          root (hd1,0)
#          kernel /vmlinuz-version ro root=/dev/VolGroup01/LogVol00
#          initrd /initrd-version.img
#boot=/dev/hda
default=0
timeout=5
splashimage=(hd1,0)/grub/splash.xpm.gz
hiddenmenu
title CentOS (2.6.18-194.26.1.el5)
        root (hd0,0)
        kernel /vmlinuz-2.6.18-194.26.1.el5 ro root=LABEL=/ rhgb quiet
psmouse.proto=bare
        initrd /initrd-2.6.18-194.26.1.el5.img
title CentOS (2.6.18-194.17.1.el5)
        root (hd0,0)
        kernel /vmlinuz-2.6.18-194.17.1.el5 ro root=LABEL=/ rhgb quiet
psmouse.proto=bare
        initrd /initrd-2.6.18-194.17.1.el5.img
title CentOS (2.6.18-194.11.3.el5)
        root (hd1,0)
        kernel /vmlinuz-2.6.18-194.11.3.el5 ro
root=/dev/VolGroup01/LogVol00 rhgb quiet psmouse.proto=bare
        initrd /initrd-2.6.18-194.11.3.el5.img
title CentOS5.5 (2.6.18-194.el5)
        root (hd0,0)
        kernel /vmlinuz-2.6.18-194.el5 ro root=LABEL=/ rhgb quiet
psmouse.proto=bare
        initrd /initrd-2.6.18-194.el5.img

Thanks,
Dave