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MD3000 Virtual Disk cache tuning?
Hi All, we have a SQL server TempDB drive being served from an MD3000. It's comprised of (4) 15K SAS drives in a RAID 10 array. I was recently asked to see if there was a way to adjust the cache settings on this virtual drive to favor writes vs. reads. I looked all over MDSM but could not find any cache settings. According to this doc, there are GUI and CLI settings available, but they do not tell you where? > ftp://ftp.dell.com/Manuals/all-products/esuprt_ser_stor_net/esuprt_powervault/powervault-md3000_User%27s%20Guide2_en-us.pdf
I'd prefer to do this through the GUI if possible. Anyone know where these setting are located in MDSM or how I can even verify what they're currently set to?
Thanks!
DELL-Sam L
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September 17th, 2014 10:00
Hello dkraut,
With the MD3xxx systems you set the read & write cache settings when you create the virtual disk. The only way to change the settings is to recreate the virtual disk & set it to the read / write ratio that you are wanting & then copy the data back to the new virtual disk.
Please let us know if you have any other questions.
dkraut
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September 17th, 2014 11:00
Thanks Sam, is there anyway to view the current settings? what are the default settings? 50/50?
DELL-Sam L
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September 23rd, 2014 15:00
Hello dkraut,
I believe that if you select the virtual disk & go to the properties it will show you what the read/write ratio is set to.
Please let us know if you have any other questions.