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January 30th, 2017 04:00
Write Cache Settings for SSD & HDD on H730P
Hi,
I have a H730P Raid Controller (Perc9) with 2gb cache running in my T430-Server. I use VMWare Esxi 6.0 (Dell Version) for several VMs.
I have two Raids
- SSD Raid 10 (4x 480gb SATA)
- HDD Raid 6 (7x 300gb SAS) with DAS Cache Licence and 480gb SSD SATA
Both Raids are configured as a virtual disk (1x 960gb ssd, 1x 1500gb)
How does my Controller Write Cache has to be configured for each virtual disk? Especially with regards to FastPath (for the SSDs) or would you advise against using that?
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DELL-Josh Cr
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January 30th, 2017 10:00
Hi,
Having the write cache enabled on both arrays should be the best performance. You may want to test with it disabled to be sure. The cache memory is DDR3 1866, which has a peak transfer rate of 14933.33MB/s.
dhiru1602
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February 9th, 2017 16:00
Hi Josh,
Why is that you recommend write cache over fastpath for SSDs? Any specific reason?
DELL-Josh Cr
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February 10th, 2017 08:00
You may want to see if fastpath is better for your workload, but it does depend on how the array is being used.