Re: aacraid write through cache into write back cache

[Samuel Díaz García <samueldg arcoscom com>]

Any kernel parameter or module parameters?
Any idea in how to solve the problem?

Samuel Díaz García escribió:

> I have an Adaptec 2410SA raid controller with RAID 1 configured on it.
> The system is an AMD ATHLON 1800 CPU. With FC4 updated distro.
>
> The system is working fine, but TOOOOOOOOOOOOO SLOOOOOWWWWWWWWWW.
>
> Taking a view into startup messages I can see:
>
> sda: got wrong page
> sda: assuming drive cache: write through
>
> In dmesg:
>
> ...
> AAC0: kernel 4.1-0[5934]
> AAC0: monitor 4.1-0[5934]
> AAC0: bios 4.1-0[5934]
> AAC0: serial bab115
> scsi0 : aacraid
>   Vendor: ADAPTEC   Model: UNO               Rev: V1.0
>   Type:   Direct-Access                      ANSI SCSI revision: 02
> SCSI device sda: 156247808 512-byte hdwr sectors (79999 MB)
> sda: Write Protect is off
> sda: Mode Sense: 03 00 00 00
> sda: got wrong page
> sda: assuming drive cache: write through
> SCSI device sda: 156247808 512-byte hdwr sectors (79999 MB)
> sda: Write Protect is off
> sda: Mode Sense: 03 00 00 00
> sda: got wrong page
> sda: assuming drive cache: write through
>  sda: sda1 sda2 sda3
> Attached scsi removable disk sda at scsi0, channel 0, id 0, lun 0
> ...
>
> I think changing write through into write back cache will solve the 
> problem.
>
> The controller utility was used to configure all caches in the drivers.
>
> Any help about this topic?
>
> Thanks

--
   Samuel Díaz García
    Director Gerente
ArcosCom Wireless, S.L.L.

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