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With a raid controller there you have good caching of read/write requests, but with the SD card you run without any managed cache You are limited to a single read/write channel at a time, with pure disks you have a heavy duty raid controller handling it all for youģ. You share the same USB bus speed for disk read/write, VMs virtual memory, Swap space for esx, log for esx and more (all is handled by esx before committed to disk)Ģ. I am assuming you are using a SD card reader with USB connetivity, and then you have the following problems compared to a pure disk setup:ġ.
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#HP DL360 G6 INTERNAL USB VS SD HOW TO#
Has anyone encountered this? Any idea how to fix? Or am I wasting my time and just stick with the spindles? It's not a show stopper because it LAB testing but I really wanted to use every bit (Byte?) of the RAID 5 storage. I spin up a 21012 R2 VM on the RAID 5 spindles and I get consistent speeds of 14-16MB/s.įor sanity check, I reconfigured for both test setups above twice to test and the results were the same. I blow away the current RAID set from the old config and create the same 4 disks in a RAID 5 as well. Now, I plug in an SD card I scooped up from Frys: | PNY (pretty descent R/W speeds of 90Mb/s) and install ESXi 5.5 U2 on the SD card. I configure as above, install ESXi 5.5 U2 on just the spindles, build up a 2012 R2 VM and I get consistent typical speeds of 48 - 54MB/s using the SQLIO utility. RAID: Set with 4 HP 6GB 10K RPM SAS drives in a RAID 5
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RAID Controller: P410i w/1GB FBWC with UltraCap I have an HP D元60 G6 with the below hardware