Windows 2012 - falling speed write on one of the partitions

welcome, 

from time fight declining performance of 1 of partition - , more specifically: 
on time write speed decreases on 1 of partitions (called "data") in server managed windows 2012. after rebooting machine - write speed on partition called "data" (gpt) 100mb/s. after 2-3 days of work speed linearly decreases 100-800kb/s. it not matter whether data source locally (partition c) or network share.

configuration: 

dell r520 , perc h710mini possible patch's
8x 15k rpm disks (internal disk)
2 local partitions (basic windows mbr , gpt "data:) 
dfs, nlb - turned off
nic teaming - 2x1gb

...already change motherboard , perc on brand new - still same. 

have 2 identical servers - second one, working reserve "problematic (first one)," there no such problems. 

differences able observe: 
1) problematic server - when run command "fsutil fsinfo volumeinfo d" indicates there installed option "supports file-based compression" on "data" partition 

2) best practices analyzer: 
" problem: 
problem enablethroughputschedule_problem 
impact: 
impact enablethroughputschedule_impact 
resolution: 
resolution enablethroughputschedule_resolution " 

have idea solutions?

 

hi,

please try run chkdsk on partition check if there error on partition.

chkdsk
http://technet.microsoft.com/pl-pl/library/cc730714(v=ws.10).aspx

you refer thread below troubleshoot issue:

server 2012 essentials storage spaces, extremely slow read speeds (write speeds expected)
http://social.technet.microsoft.com/forums/windowsserver/en-us/a58f8fce-de45-4032-a3ef-f825ee39b96e/server-2012-essentials-storage-spaces-extremely-slow-read-speeds-write-speeds-as-expected?forum=winserverfiles

regards,

mandy

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