About boot question

[watermelonyu]

unix model is k570 OS is hp 11.0 and two boot disk and do mirror.





兩顆boot disk 10/0.5.0 and 10/0.5.0



#lvlnboot -v

Boot Definitions for Volume Group /dev/vg00:

Physical Volumes belonging in Root Volume Group:

/dev/dsk/c0t6d0 (10/0.6.0) -- Boot Disk

/dev/dsk/c0t4d0 (10/0.4.0)

/dev/dsk/c0t5d0 (10/0.5.0)

Boot: lvol1 on: /dev/dsk/c0t6d0

/dev/dsk/c0t5d0

Root: lvol3 on: /dev/dsk/c0t6d0

/dev/dsk/c0t5d0

Swap: lvol2 on: /dev/dsk/c0t6d0

/dev/dsk/c0t5d0

Dump: dump_1 on: /dev/dsk/c0t4d0, 0



#setboot

Primary bootpath : 10/0.6.0

Alternate bootpath : 10/0.5.0



Autoboot is ON (enabled)

Autosearch is ON (enabled)



使用10/0.6.0(primary path)可以正常開機

使用10/0.5.0(alternate path) 無法開機

進入到isl:hpux 就 hang住囉



提供以下資訊:

#lifcp /dev/rdsk/c0t5d0:AUTO -

hpux



#lifls -l /dev/rdsk/c0t5d0

volume c0t5d0 data size 7984 directory size 8 06/01/10 12:16:18

filename type start size implement created

===============================================================

ISL -12800 584 240 0 99/10/28 15:23:53

AUTO -12289 824 1 0 99/10/28 15:23:53

HPUX -12928 832 800 0 99/10/28 15:23:53

PAD -12290 1632 1700 0 99/10/28 15:23:54

LABEL BIN 3336 8 0 06/01/11 10:23:32



另一台機器 os是11.11i

#lvlnboot -vBoot Definitions for Volume Group /dev/vg00:

Physical Volumes belonging in Root Volume Group:

/dev/dsk/c2t1d0 (0/1/1/0.1.0) -- Boot Disk

/dev/dsk/c2t0d0 (0/1/1/0.0.0) -- Boot Disk

Boot: lvol1 on: /dev/dsk/c2t1d0

/dev/dsk/c2t0d0

Root: lvol3 on: /dev/dsk/c2t1d0

/dev/dsk/c2t0d0

Swap: lvol2 on: /dev/dsk/c2t1d0

/dev/dsk/c2t0d0

Dump: lvol2 on: /dev/dsk/c2t1d0, 0



mirror disk 會顯現boot disk

而k570台mirror

[watermelonyu]

應是當初create disk的時候少打了幾個指令. 以下為正常程

序.



1. #pvcreate -B /dev/rdsk/c0t5d0

2. #mkboot /dev/dsk/c0t5d0

3. #mkboot -a "hpux -lq (;0)/stand/vmunix" /dev/dsk/c0t5d0



create好disk後, 再接著做vgextend /dev/vg00 /dev/dsk/c0t5d0, 然後再去做lvextend ....



另外, 給你個建議, 通常不會把c0t6d0和c0t5d0做成

mirror disk, 因為兩顆disk出自同一張scsi bus, 如果

當此scsi but出問題時, 即便有mirror, 一樣開不起來.

比方, 挑c0t6d0, 和c8t6d0做root mirror會比較適當.

[watermelonyu]

Matthew兄:

請問如果當初少做這些指令 要如何補救

要如何讓c0t5d0也可以變成boot disk



我有按照上述步驟做: 但是好像無法執行第一個步驟 #pvcreate -B /dev/rdsk/c0t5d0



要如何做比較妥當 是否要先把 /dev/dsk/c0t5d0 脫離vg00 這個步驟如何做??

[watermelonyu]

找到答案囉

要切開vg00的程序如下:

1) boot to ISL>

ISL> hpux -lm (進入matainlance model)

#vgchange -a n /dev/vg00

#vgexport -m /mapfile /dev/vg00

remove your c0t0d1 from chassis

#mkdir /dev/vg00

#mknod /dev/vg00/group c 64 0x0?0000(replace ?with your original vg00 minor number)

#vgimport -v -m /mapfile /dev/vg00 /dev/dsk/c0t0d0

#vgchange -a y /dev/vg00

#strings /etc/lvmtab

#vgscan -v

#vgcfgbackup vg00

#vgreduce -f /dev/vg00 /dev/dsk/c0t0d1

#vgscan -v

#vgdisplay -v /dev/vg00 to check

就可以切開vg00



切開重新 create boot disk 並做mirror

就可以 步驟如下:

1. Add a bootable LVM disk. Create a physical volume using pvcreate with the -B option.



# pvcreate -B /dev/rdsk/c0t5d0Refer to LVMKBRC00006255 if pvcreate errors with "The physical volume already belongs to a volume group."



2. Add the physical volume to the existing root volume group with vgextend:



# vgextend /dev/vg00 /dev/dsk/c0t5d03. Use mkboot to place boot utilities in the boot area:



# mkboot -l /dev/rdsk/c0t5d0Use mkboot to add an AUTO file in boot LIF area:



# mkboot -a "hpux" /dev/rdsk/c0t5d0Or, use the -lq option to allow the system to boot in the event that one of the disks is unavailable, resulting in a loss of quorum.



# mkboot -a "hpux -lq" /dev/rdsk/c0t5d0NOTE: Use the -lq option when the root volume group contains only 2 disks. If more than 2 disks are in the root volume group, the -lq option is not needed as quorum will be maintained even if 1 disk fails.



Check the contents of the AUTO file with



# lifcp /dev/rdsk/c0t5d0:AUTO -Alternatively, one could set the alternate boot path variable according to for example



# setboot -a 8/0/19/0.5.0The hardware address of the disk that will become the mirror disk can be determined with 'ioscan -fnC disk'. To check, use setboot without any arguments.



If desired, activate autosearch and autoboot by



# setboot -s on -b on4. Use pvdisplay -v to note the sequence of the logical volumes on the primary disk.