LinuxQuestions.org - [SOLVED] Raid 0 /dev/md0 shows only 9.7 gbs. Why is it not showing 3tb?

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Raid 0 /dev/md0 shows only 9.7 gbs. Why is it not showing 3tb?

this is my fdisk -l

Code:

Disk /dev/sdc: 750.1 GB, 750156374016 bytes

255 heads, 63 sectors/track, 91201 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes



Disk /dev/sdc doesn't contain a valid partition table



Disk /dev/sdd: 750.1 GB, 750156374016 bytes

255 heads, 63 sectors/track, 91201 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes



Disk /dev/sdd doesn't contain a valid partition table



Disk /dev/sde: 750.1 GB, 750156374016 bytes

255 heads, 63 sectors/track, 91201 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes



Disk /dev/sde doesn't contain a valid partition table



Disk /dev/md0: 3000.6 GB, 3000621858816 bytes

255 heads, 63 sectors/track, 364804 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes



    Device Boot      Start        End      Blocks  Id  System

/dev/md0p1              1      91201  732572001  fd  Linux raid autodetect

when I mount /dev/md0 it shows up as 9.7gbs.

Code:

Filesystem            Size  Used Avail Use% Mounted on

/dev/md0              9.7G  2.6G  6.7G  28% /mnt

I have tried it also with having all 4 hard drives with a valid partition table. Please help. Thanks
Davide123

Hi,

for software raid a minimum of 1 partition of type fd (Linux Auto RAID) is required. Non of your disk shows a partition.

Please post the out of

Code:

cat /proc/mdstat

The output of:

Code:

mdadm --detail /dev/md0

Would be helpful here.

sorry but I have to wait until Monday Eastern time to post output. I am unable to get to my network outside of work.
However like I said in my first post, I had also tried the raid with each of the 4 HD having 1 valid FD Linux auto raid. Should I only have 1 HD with a partition and the others with no partitions?

Are you using 32 or 64 bit Linux? I am not sure if 32 bit systems can handle file-systems that large.

Hi
I am using 64 bit OS
Here is the output of the above to requests:
cat /proc/mdstat

Code:

Personalities : [raid0]

md0 : active raid0 sda[0] sde[3] sdd[2] sdc[1]

      2930294784 blocks 1024k chunks



unused devices: <none>

mdadm --detail /dev/md0

Code:

/dev/md0:

        Version : 00.90.03

  Creation Time : Fri Oct 29 11:23:40 2010

    Raid Level : raid0

    Array Size : 2930294784 (2794.55 GiB 3000.62 GB)

  Raid Devices : 4

  Total Devices : 4

Preferred Minor : 0

    Persistence : Superblock is persistent



    Update Time : Fri Oct 29 11:23:40 2010

          State : clean

 Active Devices : 4

Working Devices : 4

 Failed Devices : 0

  Spare Devices : 0



    Chunk Size : 1024K



          UUID : 362a8c3f:7a08aea7:c5f4e932:1a2dc824

        Events : 0.3



    Number  Major  Minor  RaidDevice State

      0      8        0        0      active sync  /dev/sda

      1      8      32        1      active sync  /dev/sdc

      2      8      48        2      active sync  /dev/sdd

      3      8      64        3      active sync  /dev/sde

Can anybody help me here?

Clearly /dev/md0 is showing 3 Tb; but what filesystem are you using? (ie ext3, xfs....) and how did you format it? (ie default parameters?)

I am used mkfs.ext3 to format the hard drives with ext3 FS

I don't know what is going on I haven't touched this machine since I posted the issue but now all of a sudden I can mount /dev/md0 and it shows 2.7TB so I guess I fixed it?

The power went out on Monday and forced the machine to reboot, so maybe that is all it needed?

Probably! Ext3's maximum capacity depends on how it was formatted, but you should easily have 3 Tb. Guess you can mark it solved.