Re: (no subject): grub recog of 3drives (2 linux)

[Jeff Sheinberg]

Melissa Golter writes:
 > all drives are mapped but, no matter if i use 
 > kernel /vmlinuz-2.4.20-8smp ro root=LABEL=/ hda=ide-scsi
 > or
 > kernel /vmlinuz-2.4.20-8smp ro root=/dev/sdd2 hda=ide-scsi
 > 
 > I get error 15
 > root (hd2,0)
 >  Filesystem type is ext2fs, partition type 0x83
 > kernel /vmlinuz-2.4.20-8smp ro root=LABEL=/ hda=ide-scsi
 > (or
 > kernel /vmlinuz-2.4.20-8smp ro root=/dev/sdd2 hda=ide-scsi)
 > 
 > Error 15: File not found
 > 
 > / is on partition 2 on sdd (hd2)
                               ^^^

How do you know that this is the case?

Grub can show you its view of the world if you just ask it to.

First, reboot your computer, then, when the grub menu appears, do
the following,

    type: the ESC key - puts you into grub interactive command mode

    type: root (hd<TAB> - that means ... lettter h, letter d, then TAB key

Okay, here is an example from the grub shell (running under linux,
where kernel & rootfs is on /dev/hda7 on my computer), but you
need to do this from the *real* grub bootloader on your computer,

    grub> root (hd<TAB>
     Possible disks are:  hd0 hd1 hd2

    grub> root (hd0,<TAB>
     Possible partitions are:
       Partition num: 0,  Filesystem type is fat, partition type 0x6
       Partition num: 2, [BSD sub-partitions immediately follow]
         BSD Partition num: 'a',  Filesystem type is ffs, partition type 0xa9
         BSD Partition num: 'b',  Filesystem type unknown, partition type 0xa9
         BSD Partition num: 'e',  Filesystem type is fat, partition type 0xa9
         BSD Partition num: 'f',  Filesystem type is ext2fs, partition type 0xa9
         BSD Partition num: 'g',  Filesystem type unknown, partition type 0xa9
         BSD Partition num: 'h',  Filesystem type is ext2fs, partition type 0xa9
         BSD Partition num: 'i',  Filesystem type is ext2fs, partition type 0xa9
         BSD Partition num: 'j',  Filesystem type is ext2fs, partition type 0xa9
         BSD Partition num: 'k',  Filesystem type is ext2fs, partition type 0xa9
       Partition num: 3,  Filesystem type is ext2fs, partition type 0x83
       Partition num: 4,  Filesystem type unknown, partition type 0x82
       Partition num: 5,  Filesystem type is ext2fs, partition type 0x83
       Partition num: 6,  Filesystem type is ext2fs, partition type 0x83
       Partition num: 7,  Filesystem type is ext2fs, partition type 0x83
       Partition num: 8,  Filesystem type is ext2fs, partition type 0x83

    grub> root (hd0,6)<ENTER>
     Filesystem type is ext2fs, partition type 0x83

    grub> kernel /boot/vmlinuz-2.4.2<TAB>
     Possible files are: vmlinuz-2.4.21-4 vmlinuz-2.4.22-2

    grub> help<ENTER>
    blocklist FILE                         boot
    cat FILE                               chainloader [--force] FILE
    clear                                  color NORMAL [HIGHLIGHT]
    configfile FILE                        device DRIVE DEVICE
    displayapm                             displaymem
    find FILENAME                          geometry DRIVE [CYLINDER HEAD SECTOR 
[
    halt [--no-apm]                        help [--all] [PATTERN ...]
    hide PARTITION                         initrd FILE [ARG ...]
    kernel [--no-mem-option] [--type=TYPE] makeactive
    map TO_DRIVE FROM_DRIVE                md5crypt
    module FILE [ARG ...]                  modulenounzip FILE [ARG ...]
    pager [FLAG]                           partnew PART TYPE START LEN
    parttype PART TYPE                     quit
    reboot                                 root [DEVICE [HDBIAS]]
    rootnoverify [DEVICE [HDBIAS]]         serial [--unit=UNIT] [--port=PORT] 
[--
    setkey [TO_KEY FROM_KEY]               setup [--prefix=DIR] 
[--stage2=STAGE2_
    terminal [--dumb] [--no-echo] [--no-ed terminfo [--name=NAME 
--cursor-address
    testvbe MODE                           unhide PARTITION
    uppermem KBYTES                        vbeprobe [MODE]

The TAB key is your friend, so is the "find" and "geometry" commands.

    grub> geometry (hd2)<ENTER>
    drive 0x82: C/H/S = 527/255/63, The number of sectors = 8467200, /dev/sdb
       Partition num: 1, [BSD sub-partitions immediately follow]
         BSD Partition num: 'a',  Filesystem type is ffs, partition type 0xa5
         BSD Partition num: 'b',  Filesystem type is ext2fs, partition type 0xa5
         BSD Partition num: 'e',  Filesystem type is ext2fs, partition type 0xa5
         BSD Partition num: 'f',  Filesystem type unknown, partition type 0xa5
         BSD Partition num: 'g',  Filesystem type is ext2fs, partition type 0xa5
         BSD Partition num: 'h',  Filesystem type is ext2fs, partition type 0xa5
       Partition num: 2,  Filesystem type is ext2fs, partition type 0x83
       Partition num: 3,  Filesystem type is ext2fs, partition type 0x83
       Partition num: 4,  Filesystem type unknown, partition type 0x82
       Partition num: 5,  Filesystem type is ext2fs, partition type 0x83
       Partition num: 6,  Filesystem type is ext2fs, partition type 0x83

Have you read the grub info docs yet?

-- 
Jeff Sheinberg