Christopher,
> [root@daisy cron.daily]# tw_cli /c8 show
> Unit UnitType Status %RCmpl %V/I/M Stripe Size(GB) Cache
> AVrfy
> ------------------------------------------------------------------------------
> u0 RAID-5 OK - - 256K 11175.8 Ri ON
> VPort Status Unit Size Type Phy Encl-Slot Model
> ------------------------------------------------------------------------------
> p0 OK u0 3.63 TB SATA 0 - WDC
> WD4005FZBX-00K5
> p1 OK u0 3.63 TB SATA 1 - WDC
> WD4005FZBX-00K5
> p2 OK u0 3.63 TB SATA 2 - WDC
> WD4005FZBX-00K5
> p3 OK u0 3.63 TB SATA 3 - WDC
> WD4005FZBX-00K5
you are running your RAID-controller without BBU and without write
caching. (see the Ri statement)
I get
tw_cli /c0 show
Unit UnitType Status %RCmpl %V/I/M Stripe Size(GB) Cache AVrfy
------------------------------------------------------------------------------
u0 RAID-6 OK - - 256K 16763.7 RiW ON
VPort Status Unit Size Type Phy Encl-Slot Model
------------------------------------------------------------------------------
p0 OK u0 2.73 TB SATA 0 - WDC WD30EURS-63SPKY0
p1 OK u0 2.73 TB SATA 1 - WDC WD30EURS-63R8UY0
p2 OK u0 2.73 TB SATA 2 - WDC WD30EURS-63SPKY0
p3 OK u0 2.73 TB SATA 3 - WDC WD30EURS-63SPKY0
p4 OK u0 2.73 TB SATA 4 - WDC WD30EURS-63SPKY0
p5 OK u0 2.73 TB SATA 5 - WDC WD30EURS-63SPKY0
p6 OK u0 2.73 TB SATA 6 - WDC WD30EURS-63SPKY0
p7 OK u0 2.73 TB SATA 7 - WDC WD30EURS-63SPKY0
Name OnlineState BBUReady Status Volt Temp Hours LastCapTest
---------------------------------------------------------------------------
bbu On Yes OK OK OK 197 31-Dec-2019
with the same type of controllers. When I did the initial
installation, I found that the write caching makes a VERY big
difference in my mailserver application. However, you might have get
problems finding a matching BBU these days if your controller is not
very recent. And depending on where you are located and how good your
power supply is, you don't want to activate write caching without a
BBU.
cheers,
---
Michael Schumacher
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