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<H2><A NAME="s6">6. Features in the EATA DMA driver</A></H2>
<P> 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.
<P> To see the configuration for your driver, type:
<P>
<BLOCKQUOTE><CODE>
<PRE>
% cat /proc/scsi/eata_dma/N
</PRE>
</CODE></BLOCKQUOTE>
<P>where N is the host id for the controller. You should see something
like this:
<P>
<BLOCKQUOTE><CODE>
<PRE>
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.
</PRE>
</CODE></BLOCKQUOTE>
<BLOCKQUOTE><CODE>
<PRE>
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
</PRE>
</CODE></BLOCKQUOTE>
<P> To get advanced command statistics, type:
<P>
<BLOCKQUOTE><CODE>
<PRE>
% echo "eata_dma latency" > /proc/scsi/eata_dma/N
</PRE>
</CODE></BLOCKQUOTE>
<P> Then you can do a:
<P>
<BLOCKQUOTE><CODE>
<PRE>
% cat /proc/scsi/eata_dma/N
</PRE>
</CODE></BLOCKQUOTE>
<P>to get more detailed statistics.
<P> To turn off advanced command statistics, type:
<P>
<BLOCKQUOTE><CODE>
<PRE>
% echo "eata_dma nolatency" > /proc/scsi/eata_dma/N
</PRE>
</CODE></BLOCKQUOTE>
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