[CentOS] Re: LVM Input/output error

itayf at nospammail.net spake the following on 7/10/2006
7:09 AM:
> 
>> > [root at frodo ~]# sfdisk -l /dev/sdc
>> >
>> > Disk /dev/sdc: 38913 cylinders, 255 heads, 63 sectors/track
>> > Units = cylinders of 8225280 bytes, blocks of 1024 bytes,
>> > counting from 0
>> >
>> >     Device Boot Start     End   #cyls    #blocks   Id  System
>> > /dev/sdc1   *      0+    254     255-   2048256    c  W95 FAT32 (LBA)
>> > /dev/sdc2        255   38912   38658  310520385   83  Linux
>> > /dev/sdc3          0       -       0          0    0  Empty
>> > /dev/sdc4          0       -       0          0    0  Empty
>> >
>> > ** I note that the file system on /dev/sdc2 is 'Linux' and not
>> > 'Linux LVM'.  This is what I got, eventhough I created it with
>> >       parted /dev/sdc mkpart ...
>>
>> There's your problem I think. In my first post, I *guessed* that type
>> needed to be 86. I'm sure 83 is NG - that's a standard Linux part. With
>> fdisk and it's variations, there is a command to change partition type.
>> Do that and select the one that shows LVM 986 I think). Write and
>> (possibly) reboot or sfdisk -R /dev/sdc (which re-reads the partition
>> info. If it shows *LVM* as the type, do you pvcreate, vgcreate, etc. and
>> I bet you are OK.
>>
> 
> Had to wait until I came back to work and could reboot the machine.
> Using William's instructions, modulus using 8e as Matt Hyclak pointed
> out, seems to solve the problem.  Everything seems to work fine:
> lvcreation, writing files, etc.
> 
> The only odd thing is in regard to the output of sfdisk.  Note the
> warning when 'sfdisk -l' is invoked without a device argument. 
> According to the man page this is a legitimate call that should produce
> output similar in nature to 'fdisk -l' (which works as expected).
> 
> <man>
>        The  second  type  of invocation: sfdisk -l [options] device will
> list
>        the partitions on this device.  If the device argument is
> omitted, the
>        partitions on all hard disks are listed.
>        % sfdisk -l /dev/hdc
> </man>
> 
Since programmers are notorious for putting off the documentation, it is very
common to have man pages not completely in sync with a program.


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