Linux DPT Hardware RAID HOWTO : Features in the EATA DMA driver

Next Previous Contents

## 6. Features in the EATA DMA driver

This section describes some of the commands available under Linux to check on the RAID configuration. Again, while references to the eata_dma driver is made, this can be used to check up on any driver.

To see the configuration for your driver, type:

> `

>     % cat /proc/scsi/eata_dma/N

> `

where N is the host id for the controller. You should see something like this:

> `

>     EATA (Extended Attachment) driver version: 2.59b
>     queued commands:         353969
>     processed interrupts:    353969

>     scsi0 : HBA PM2144UW
>     Firmware revision: v07L.Y
>     Hardware Configuration:
>     IRQ: 11, level triggered
>     DMA: BUSMASTER
>     CPU: MC68020 20MHz
>     Base IO : 0xef90
>     Host Bus: PCI
>     SCSI Bus: WIDE Speed: 10MB/sec.
>     SCSI channel expansion Module: not present
>     SmartRAID hardware: present.
>         Type: integrated
>         Max array groups:              7
>         Max drives per RAID 0 array:   7
>         Max drives per RAID 3/5 array: 7
>     Cache Module: present.

> `

> `

>         Type: 0
>         Bank0: 16MB without ECC
>         Bank1: 0MB without ECC
>         Bank2: 0MB without ECC
>         Bank3: 0MB without ECC
>     Timer Mod.: present
>     NVRAM     : present
>     SmartROM  : enabled
>     Alarm     : on
>     Host<->Disk command statistics:
>              Reads:      Writes:
>         1k:           0            0
>         2k:           0            0
>         4k:           0            0
>         8k:           0            0
>        16k:           0            0
>        32k:           0            0
>        64k:           0            0
>       128k:           0            0
>       256k:           0            0
>       512k:           0            0
>      1024k:           0            0
>     >1024k:           0            0
>     Sum   :           0            0

> `

To get advanced command statistics, type:

> `

>     % echo "eata_dma latency" > /proc/scsi/eata_dma/N

> `

Then you can do a:

> `

>     % cat /proc/scsi/eata_dma/N

> `

to get more detailed statistics.

To turn off advanced command statistics, type:

> `

>     % echo "eata_dma nolatency" > /proc/scsi/eata_dma/N

> `

Next Previous Contents