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[linux-lvm] PBs with LVM over software RAID



i have forgoten my mail : svetljo lycos com
 galia st-peter stw uni-erlangen de
i'll be tankfull for any idea  write me


can somebody tell me where is the problem and what can i do about it
the first time i try to mount the LV mount segfaults and after that i am not able to mount any other file system ( partition, CD ...) :


root svetljo#mount -o ro /dev/scd0 /mnt/cdrom
no messeges from mount but it blocks the console and does not mount the CD



i'm running MDK8.1(cooker) with kernel 2.4.9-xfs-cvs with LVM 1.0.1-rc1
ABIT BP6 dual Celleron533 512Mb RAM
onboard HPT366 UDMA66 controler
on the HPT366  2xWD 30Gb(/dev/hde /dev/hdg) 1xMaxtor 40Gb(/dev/hdh)

here is the console output:

[root svetljo mnt]# cat /proc/mdstat
Personalities : [linear] [raid0] [raid5]
read_ahead 1024 sectors
md7 : active linear hde6[1] hde11[0] 13936128 blocks 64k rounding
md6 : active linear hdg6[3] hdg12[2] hdg1[1] hdg5[0] 14409856 blocks 64k rounding
md0 : active raid0 hdh6[2] hdg10[1] hde8[0] 8064256 blocks 8k chunks
md1 : active raid0 hdh7[2] hdg9[1] hde10[0] 24579072 blocks 16k chunks
md8 : active raid0 hdh8[1] hdg7[0] 529920 blocks 64k chunks
unused devices: <none>
[root svetljo mnt]# vgscan
vgscan -- reading all physical volumes (this may take a while...)
vgscan -- found active volume group "myData"
vgscan -- found active volume group "wish"
vgscan -- "/etc/lvmtab" and "/etc/lvmtab.d" successfully created
vgscan -- WARNING: This program does not do a VGDA backup of your volume groups
[root svetljo mnt]# vgdisplay myData
--- Volume group ---
VG Name myData
VG Access read/write
VG Status available/resizable
VG # 0
MAX LV 255
Cur LV 1
Open LV 0
MAX LV Size 255.99 GB
Max PV 255
Cur PV 3
Act PV 3
VG Size 41.50 GB
PE Size 4.00 MB
Total PE 10624
Alloc PE / Size 7170 / 28.01 GB
Free PE / Size 3454 / 13.49 GB
VG UUID EqfM1F-WKiN-41Jw-D7kl-PSwv-jLp7-4fFjIo


[root svetljo mnt]# lvdisplay /dev/myData/Music
--- Logical volume ---
LV Name                /dev/myData/Music
VG Name                myData
LV Write Access        read/write
LV Status              available
LV #                   1
# open                 0
LV Size                28.01 GB
Current LE             7170
Allocated LE           7170
Stripes                3
Stripe size (KByte)    4
Allocation             next free
Read ahead sectors     32
Block device           58:0
[root svetljo mnt]# mount -t xfs /dev/myData/Music music
Segmentation fault
[root svetljo mnt]# df
Filesystem           1k-blocks      Used Available Use% Mounted on
/dev/md0               8064004   7593920    470084  95% /
/dev/hde5                31079     23564      5911  80% /boot
none                    256252         0    256252   0% /dev/shm
/dev/md1              24574272  24444608    129664 100% /mnt/md1
/dev/hde1               441520    272376    169144  62% /mnt/win_c
[root svetljo mnt]# lvdisplay /dev/myData/Music
--- Logical volume ---
LV Name                /dev/myData/Music
VG Name                myData
LV Write Access        read/write
LV Status              available
LV #                   1
# open                 1             <----
LV Size                28.01 GB
Current LE             7170
Allocated LE           7170
Stripes                3
Stripe size (KByte)    4
Allocation             next free
Read ahead sectors     32
Block device           58:0


------------------------------------------------------------------------


and one more question :

can i make a VG and LV's over  LV's
the idea is replacing the linear sofware RAID with a linear LV's, but i
think i'll have the same roblems that i had with the raid

the LV ( lvcreate -i3 -I4 -L26G -nMusic )

the VG -> myData /dev/hdh10 /dev/linVG1/linLV1 /dev/linVG2/linLV2

/dev/hdh10 normal partition 14G
/dev/linVG1/linLV1 ->  linear LV 14G /dev/hde6 /dev/hde12
/dev/linVg2/linLV2 ->  linear LV 14G /dev/hdg1 /dev/hdg5 /dev/hdg6
/dev/hdg12


> Hi i couldn't change the partition's id of the RAID but i mannaged it
> to create the VG, LV and to format the LV
> but when i try to mount the the LV mount segfaults and every try to
> do anything with the LV finish witth a sleep
> i mean when i try to mount anything ( a partition, a CD or a LV) after
> the segfault of the first ' mount -t xfs /dev/myData/Music /mnt/music
> ' mount goes to sleep and do not do anything
> vgdisplay says that the volume is activ
> lvremove says that the volume is open and can not be removed
> do you have an idea wthat is the problem
> and what can i try
>
> the LV ( lvcreate -i3 -I4 -L26G -nMusic )
>
> the VG -> myData /dev/hdh10 /dev/md6 /dev/md7
>
> /dev/hdh10 normal partition 14G
> /dev/md6 -> linear software RAID 14G /dev/hde6 /dev/hde12
> /dev/md7 -> linear software RAID 14G /dev/hdg1 /dev/hdg5 /dev/hdg6
> /dev/hdg12
>
> the reason:
>
> after trying BeOS, FreeBSD and useing windows , i was trying to switch
> complete to linux without having to repartiton all the drives( i have
> tree )
> and lose about 30G of Data + and a new instalation ( the current Data
> and instalation is over a software RAID-0 other a striped LV's or to
> back up 30 Gigs of Data
> AJ Lewis wrote:
>
>>On Thu, Aug 30, 2001 at 03:26:38PM +0200, svetljo wrote:
>>
>>>Hi i saw your postings on the lvm-board
>>>and i was woundering whether you can help me
>>>
>>>can you plese tell me how can i change the type of 'partition' on
>>>md-device (softweare Linear RAID )
>>>i can not make it with fdisk on md-device
>>>
>>>i have 3 disks with a lot of partitions and i wanted to build striped
>>>LV's on a new VG
>>>i've created the VG ( /dev/md5 /dev/md6 /dev/hdh10 )
>>>but when i try to create LV's it returns to me that not all PV's are
>>>online ( md5 )
>>>and /proc/mdstat tells me that everything is ok :
>>> md5 ( /dev/hde6 /dev/hde12 linear) and md6 (/dev/hdg1 /dev/hdg2
>>>/dev/hdg8 linear) are online
>>>but they are marked as ext2 partitions
>>>
>>>can you please help me
>>>
>>
>>I'm sorry. I don't personally have any experience using md. I suggest you
>>post this to linux-lvm. There should be people there that have done what
>>you're proposing.
>>
>>>linux-2.4.9-xfs-cvs with LVM 1.0.1rc1
>>>
>>
>>Regards,
>>
>
>








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