[RESEND]: AACRAID cache problem

Resending this since the previous message appears lost in space ..

I did some more digging around:
A "container set cache /read_cache_enable=TRUE 0" does change
the "Global Container Read Cache Size" to something other than 0.

The other day a rebooted the machine and now "Global Container Read Cache Size"
is back to 0.

Someone at Dell support told me that size 0 means that the read cache is dynamically
adjusted as needed by the adapter. He was very vauge about it, so I am not sure what to think.

Can someone tell me what size 0 mean? Has it dynamic properties or is it just
a bug which disables the readahead cache?

Finally, "hdparam -t /dev/sda" reports 45 MB/sec(10 runs when server is idle). 
Is this normal? Seems a bit low to me.
This is on a PE4400, PERC3/Di, RAID5 with 6 disks, Pentium III 860MHz.

 Jocke 

> Trying again.
> 
> After some more digging around and talking to Dell support I still
> haven't fixed this.
> 
> Can I just release the cache(container release_cache 0) and then
> do a "container set cache /write_cache_enable=TRUE 
> /unprotected=FALSE 0" and
> hope for the best?
> 
> Can I do this in a live system without wrecking the file system?
> 
>   Jocke 
> 
> > Hi List
> > 
> > I noticed that my readahead cache in my PERC 3/Di RAID 
> controller has
> > zero size, but the readahead cache is enabled. How is this 
> > possible and
> > how do I restore the readahead cache size? Can I mess with 
> > the cache settings
> > in a live RH 7.3 system?
> > 
> >  Jocke
> > 
> > Details from afacli:
> > 
> > Executing: container list
> > Num          Total  Oth Chunk          Scsi   Partition
> > Label Type   Size   Ctr Size   Usage   B:ID:L Offset:Size
> > ----- ------ ------ --- ------ ------- ------ -------------
> >  0    RAID-5 84.7GB       32KB Open    0:00:0 64.0KB:16.9GB
> >  /dev/sda             Lumentis01       0:01:0 64.0KB:16.9GB
> >                                        0:02:0 64.0KB:16.9GB
> >                                        0:03:0 64.0KB:16.9GB
> >                                        0:04:0 64.0KB:16.9GB
> >                                        0:05:0 64.0KB:16.9GB
> > 
> > 
> > AFA0> container show cache 0
> > Executing: container show cache 0
> > 
> > Global Container Read Cache Size  : 0
> > Global Container Write Cache Size : 118259712
> > 
> > Read Cache Setting        : ENABLE
> > Write Cache Setting       : ENABLE WHEN PROTECTED
> > Write Cache Status        : Active, protected
> > 
> > AFA0>
> > AFA0> controller details
> > Executing: controller details
> > Controller Information
> > ----------------------
> >          Remote Computer: .
> >              Device Name: AFA0
> >          Controller Type: PERC 3/Di
> >              Access Mode: READ-WRITE
> > Controller Serial Number: Last Six Digits = 0410D1
> >          Number of Buses: 1
> >          Devices per Bus: 15
> >           Controller CPU: i960 R series
> >     Controller CPU Speed: 100 Mhz
> >        Controller Memory: 128 Mbytes
> >            Battery State: Ok
> > 
> > Component Revisions
> > -------------------
> >                 CLI: 3.0-0 (Build #4880)
> >                 API: 3.0-0 (Build #4880)
> >     Miniport Driver: 2.7-1 (Build #3571)
> > Controller Software: 2.7-1 (Build #3571)
> >     Controller BIOS: 2.7-1 (Build #3571)
> > Controller Firmware: (Build #3571)
> >  
> > 
> 

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