On 8/14/20 4:18 AM, McIntyre, Vincent (CASS, Marsfield) wrote:
This is the device section I had before for the Promise
device {
vendor "Promise"
product "VTrak"
product_blacklist "VTrak V-LUN"
path_grouping_policy "multibus" <---------
path_selector "service-time 0"
path_checker "tur"
prio "alua" <---------
failback "immediate"
no_path_retry 30
"multibus" and "prio alua" are incompatible!
}
The only real differences are the prio and failback.
From your tests and Promise docs, it looks like it's an Active-Passive array
with ALUA support.
It should use latest firmware [1]. And ALUA must be enabled to get the best
performance and stability.
Otherwise, the array will work with only one path per LUN.
The multipath-tools default settings is already optimized for the ALUA config.
[1] https://www.promise.com/Support/DownloadCenter/VTrak/Ex30/E830f#Firmware
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