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Special Forums Hardware Filesystems, Disks and Memory Issue available disk space while using xdd Post 302354515 by mrpogo07 on Friday 18th of September 2009 11:16:05 AM
Old 09-18-2009
Issue available disk space while using xdd

Good morning,

I seem to be running into an issue with some drives I have attached to my solaris server. The drives are attached correctly, the partitions are arranged with fdisk, the ext3 filesystem is setup using mkfs, and finally the drive is mounted.

When I use xdd to perform read/write operations, for some reason with writes in particular, the drives seem to lose track of how much space is available. Using df, I can see that there are about 50 GB available on these nearly empty drives but once I begin using a write with xdd, the drive size jumps to 11 TB and the used space jumps up to 11 TB as well.

I feel as though the xdd program may be altering the partition table of some sort and is ruining the tests I'm trying to gather. If anyone has experience with xdd and could lend some assistance it would be greatly appreciated.

The command for xdd I am executing is as follows:

xdd.linux -blocksize 262144 -datapattern random -seek random -reqsize 1 -op write -targets 1 /dev/sdb1 -deletfile -mbytes 10240 -csvout "10_write_ran_256_01.txt"

Thanks for the assistance and if you need more information please ask!
 

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DPM-ADDFS(1)						    DPM Administrator Commands						      DPM-ADDFS(1)

NAME
dpm-addfs - add a filesystem to a disk pool SYNOPSIS
dpm-addfs --poolname pool_name --server fs_server --fs fs_name [ --st status ] [ --weight weight ] [ --help ] DESCRIPTION
dpm-addfs adds a filesystem to a disk pool. This command requires ADMIN privilege. OPTIONS
pool_name specifies the disk pool name previously defined using dpm-addpool. server specifies the host name of the disk server where this filesystem is mounted. fs specifies the mount point of the dedicated filesystem. status Initial status of this filesystem. It can be set to 0 or DISABLED or RDONLY. This can be either alphanumeric or the corresponding numeric value. weight specifies the weight of the filesystem. This is used during the filesystem selection. The value must be positive. It is recommended to use a value lower than 10. Default is 1. EXAMPLE
dpm-addfs --poolname Volatile --server sehost --fs /data EXIT STATUS
This program returns 0 if the operation was successful or >0 if the operation failed. SEE ALSO
dpm(1), dpm_addfs(3), dpm-addpool(1) LCG
$Date$ DPM-ADDFS(1)
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