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2
votes
2answers
56 views

mkfs on raw software raid device or partition

I am making a huge RAID10 device (8 TB) for storage on CentOS. I have created the 4 partitions on my 4 physical hard disks and have created the raid device /dev/md2 out of those 4 partitions. Now ...
0
votes
1answer
281 views

running mke2fs with limited memory

I'm working on a computer with very little memory (128MB) - for my application I need to format large drives (4TB) I'm able to format greater than 2TB disks, up to about 2.5TB, but beyond that I'm ...
1
vote
2answers
263 views

RAID issues - running mkfs on /dev/md0

I had some issues mounting my RAID array in that an error was thrown saying that an ext3 filesystem could not be found on /dev/md0. So, maybe stupidly, i ran mkfs -t ext3 /dev/md0 - has this ...
1
vote
2answers
942 views

CentOS: Set number of inodes in ext4 on Install

During installation of CentOS 6 I would like to set the number of inodes created on the ext4 partitions. Is there a way to do this? I have been unable to locate a solution. Example use case: I know ...
2
votes
1answer
804 views

How to create btrfs RAID-1 filesystem (assertion error in mkfs.btrfs)?

I tried to make a btrfs RAID-1 filesystem in "degraded mode" by following the btrfs UseCases instructions but hit a fatal assertion error. Why is this failing, and is there any workaround? The ...
1
vote
1answer
817 views

Formatting drive as XFS on Centos 5.5

We've got a Centos 5.5 server with 2 array's. One is standard ext3 mounted as /, the other is an SSD array that we are attempting to format as XFS before moving our MySQL database to it. I've ...
2
votes
1answer
209 views

get mkfs.xfs options from existing xfs filesystem

I set up a new server last week, did some testing with different mkfs.xfs options on mdadm raid5, i finally found some statisfying mkfs options. Now i am about to set up a new server having exactly ...
0
votes
1answer
8k views

mkfs fails complaining that: “/dev/sdb is apparently in use by the system; will not make a filesystem here”

This is Ubuntu server 11.10. /dev/sdb is not mounted (see outputs below) and is not used by any process that I can see. Its not used for swap as well. This is a 2nd IDE drive in the server, ...
2
votes
2answers
3k views

mkfs refuses to format device in the claim it's mounted when actually it is not

This is the problem: root@ip-10-126-247-82:~# mkfs.ext4 /dev/xvda3 mke2fs 1.41.14 (22-Dec-2010) /dev/xvda3 is mounted; will not make a filesystem here! And this is the debugging: ...
3
votes
2answers
2k views

mkfs.ext3: Wrong medium type while trying to determine filesystem size

When I try to format the /dev/drbd0 with mkfs.ext3 I get the error message: mkfs.ext3: Wrong medium type while trying to determine filesystem size. I found a solution here: ...
2
votes
1answer
338 views

Do you have to partition before running mkfs on a single partition disk?

I see that some people don't use fdisk to create a partition on /dev/sdb... what is the difference between making and not making a partition for a single partition disk? I just added a partition on a ...
3
votes
1answer
3k views

mkfs.ext4 is taking hours to complete on 4 TB RAID 5

I am running mkfs.ext4 on top of LVM on a RAID 5, and it is taking hours to complete. It's a 3 TB, four disks setup, and I'm just doing: mkfs.ext4 /dev/md0 My stripe size and width seem OK. ...
3
votes
4answers
503 views

Speeding up creation of large ext3 filesystem on CentOS 5

We are creating a large backup ext3 partition on 16TB RAID array and the mke2fs took 2.5 hours to complete. Are there any known tricks we can use to shorten this time? The aim is to lower the time ...
2
votes
3answers
1k views

Always reserve blocks for super user when formatting a file system in Linux? Even for data only partitions?

When formatting a large partition (10TB) that will hold only application data, does it make sense to have 'reserved for the super user' space? 122065906 blocks (5.00%) reserved for the super user ...
6
votes
4answers
2k views

Which “features” of ext4 existing ext4 partition uses?

When I create ext4 filesystem, there are many "features", which I can enable and disable - like has_journal, extent, huge_file and so on. Is there any way to know, which options were used while ...