Below is today's CrystalDiskMark screen capture of the ARC-1883ix-16-243's performance:
Below is the ARC-1880ix-12's performance:
As can be seen there is a dramatic improvement in the "Read" performance, but disappointing "Write" performance.
The card is set to RAID Level: 3, Block Size: 512 Bytes, Cache Attribute: Write-Back, Write Protection: Disabled, Tag Queuing: Enabled.
Below is a screen capture of the System Information:
Any suggestions on how to improve the Write Speed???
Two Issues - One positive and one not so good
Increasing the onboard memory on the ARC1883ix dramatically improves the write performance of the RAID drives, even with the write test exceeding the on board memory (in this case 8GB). Note, tests performed below the onboard memory shows inaccurately high performance.
The not so good:
The Battery Backup (ARC1883BAT) slows access to the arrays - see the test results below -
These are the results of the CrystalDisk tests with the BBU installed (this array consists of four Samsung SSD 850 Pro in RAID 0)
BTW, attempts to perform this test at 32GiB took too long to wait for
Next is the same test with the BBU removed and at 32GiB
The following is the response received from ARECA technology tech-support division:
"Regarding the performance, it is normal that array have less performance when battery connected.
because firmware default disable drive internal cache if battery module detected, for data protection concern.
battery can protect the data remain in controller cache but not the data in drive internal cache. and most of these drives without internal cache have poor performance".
Since I'm using the ARC1883ix for both array reliance and speed, I'll have to give up some reliance (i.e. rely only on the UPS) for speed
Please feel free to critique this.