[mdlug] Create an XFS file system in freespace

[R. Kannan]

Thanks to all those who replied. I successfully created the file system. BTW I noticed two things

1) I could not see the device file  /dev/sda10 after cfdisk on SuSE10.1 till I rebooted after creating the partition using cfdisk

2) '-c' is not a valid option on mkfs.xfs (at least according to the man pages).



-----Original Message-----
>From: Raymond McLaughlin <driveray at ameritech.net>
>Sent: Jul 17, 2008 2:14 AM
>To: MDLUG's Main discussion list <mdlug at mdlug.org>
>Subject: Re: [mdlug] Create an XFS file system in freespace
>
>R. Kannan wrote:
>> Hello,
>> 
>> I want to create an XFS in the freespace available on my hard drive for storing MPEG
>> video files created by MythTV. Apparently MythTV does not work well with ReiserFS (Ver3)
>> that I have. If I understand correctly to do this, I have to:
>> 
>> 1) Create a partition using 'cfdisk'. But cfdisk presents a lot of file system types
>> (default is Linux? type 82) but not XFS. Which one do I choose?
>
>fdisk, and by extension cfdisk, only deal with "partition types" which 
>are defined in the partition table(s). Once defined, partitions can 
>actually be "formatted" with any filesystem type, or as swap or other 
>"raw" data, or left blank. Linux will talk to any partition type, if it 
>understands the file system.
>
>One time, back when I was dual booting, I switched a disk partition from 
>NTFS to (I think) ReiserFS just by running mkfs and changing /etc/fstab. 
>I  left the partition type as '7' instead of changing it to 83, and 
>linux never complained.
>
>Lke wise it's not teribly uncommon for a beginner setting up a system 
>to partition a hard drive with (c0fdisk and leave all the partition 
>types as 83 (linux), even the swap partition which should be type 82 
>(linux swap/SOLARIS). The system will use the swap space, probably 
>without complaining.
>
>Windows, on the other hand will ignore any "unknown" partition type, 
>which makes it very easy to hide fat or ntfs filesystems just by 
>changing the partition type with (linux) fdisk.
>
>I you want to determine the filesystem contained on a given partiton use 
>the command: file -s <device>
>
>> 2) Create a file system using 'mkfs -t xfs /dev/sda10' Are there any options that I
>> should use?
>
>If the device already contains a file system mkfs my refuse to write a 
>new one without the 'force' option:
>
>     mkfs -t xfs -f /dev/sda10
>or
>     mkfs.xfs -f /dev/sda10
>
>Of course you want to be absolutely sure about your target before 
>running mkfs.
>
>I hope this helps
>Raymond McLaughlin
>
>> Thanks 
>> 
>> Raj K
>
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