Disk Cache Write-through or Write-back

System Performance RAID Performance
1

Thanks to Fernando and everyone for the great information…

I have modified Raid bios for my system… v14.8.12.1059 drivers / v14.8.2.2397 bios module

My system is very stable and I never get any BSOD’s

I do have a 1500w UPS for my system…runtime is about 35 mins.

My question is about the Raid cache…currently I use Write-Through…should I go for Write-Back

2

Yes, the option "Write-Back" is the best, if you want to boost your RAID performance while writing data.

3

Thanks once again fernando…you are a great source of information.

4

Ok…so I enabled Write-Back…

Write-Through results:

CrystalDiskMark 5.2.0 x64 (C) 2007-2016 hiyohiyo
Crystal Dew World : http://crystalmark.info/
-----------------------------------------------------------------------
* MB/s = 1,000,000 bytes/s [SATA/600 = 600,000,000 bytes/s]
* KB = 1000 bytes, KiB = 1024 bytes

Sequential Read (Q= 32,T= 1) : 211.169 MB/s
Sequential Write (Q= 32,T= 1) : 196.003 MB/s
Random Read 4KiB (Q= 32,T= 1) : 5.408 MB/s [ 1320.3 IOPS]
Random Write 4KiB (Q= 32,T= 1) : 3.004 MB/s [ 733.4 IOPS]
Sequential Read (T= 1) : 204.437 MB/s
Sequential Write (T= 1) : 191.494 MB/s
Random Read 4KiB (Q= 1,T= 1) : 1.332 MB/s [ 325.2 IOPS]
Random Write 4KiB (Q= 1,T= 1) : 2.566 MB/s [ 626.5 IOPS]

Test : 1024 MiB [C: 23.9% (445.6/1862.5 GiB)] (x5) [Interval=5 sec]
Date : 2016/12/09 10:51:34
OS : Windows 10 Professional [10.0 Build 14393] (x64)


Write-Back results:

-----------------------------------------------------------------------
CrystalDiskMark 5.2.0 x64 (C) 2007-2016 hiyohiyo
Crystal Dew World : http://crystalmark.info/
-----------------------------------------------------------------------
* MB/s = 1,000,000 bytes/s [SATA/600 = 600,000,000 bytes/s]
* KB = 1000 bytes, KiB = 1024 bytes

Sequential Read (Q= 32,T= 1) : 212.557 MB/s
Sequential Write (Q= 32,T= 1) : 211.660 MB/s
Random Read 4KiB (Q= 32,T= 1) : 6.009 MB/s [ 1467.0 IOPS]
Random Write 4KiB (Q= 32,T= 1) : 3.787 MB/s [ 924.6 IOPS]
Sequential Read (T= 1) : 211.389 MB/s
Sequential Write (T= 1) : 211.575 MB/s
Random Read 4KiB (Q= 1,T= 1) : 1.438 MB/s [ 351.1 IOPS]
Random Write 4KiB (Q= 1,T= 1) : 3.598 MB/s [ 878.4 IOPS]

Test : 1024 MiB [C: 23.9% (445.6/1862.5 GiB)] (x5) [Interval=5 sec]
Date : 2016/12/09 11:06:18
OS : Windows 10 Professional [10.0 Build 14393] (x64)