Date: Mon, 5 Oct 1998 14:27:51 -0500 (CDT) From: Richard Kaszeta <kaszeta@me.umn.edu> To: Michael Kunze <mkunze@ivw.de> Cc: "aic7xxx@FreeBSD.ORG" <aic7xxx@FreeBSD.ORG> Subject: Re: Ultra2 transfer mode? Message-ID: <13849.7607.119459.475917@bofh.me.umn.edu> In-Reply-To: <36190ABA.C835F0B8@ivw.de> References: <36190ABA.C835F0B8@ivw.de>
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Michael Kunze writes ("Ultra2 transfer mode?"):
>pre 15 works for me without problems on an Asus P2B-LS. There is still a
>question left i asked some mails ago. If i take a look into
>/proc/scsi/aic7xxx/0, i see
>
>Statistics:
>(scsi0:0:0:0)
>Device using Wide/Async transfers.
> ^ ^ ^ ^
>Device Negotiation Settings
>Period Offset Bus Width
>User 000 000 1
>Goal 000 000 1
>Current 000 000 1
>Total transfers 3595 (3370 read;225 written)
>blks(512) rd=16267; blks(512) wr=654
>
>This should be definitely synchronous, because the harddisk is an IBM
>DGHS09V Ultra2-SCSI, which of course is capable of ultra2 synchronous
>transfers.
>
>So, what is the REAL transfer mode? 80 Mbyte/s synchronous or 20 MByte/s
>or
>less asynchronous?
I would suspect for some reason it is async, since if I look at my
machine (P2B-LS with ST34573LW), I get
Statistics:
(scsi0:0:0:0)
Device using Wide/Sync transfers at
80.0 MByte/sec, offset 15
Device Negotiation Settings
Period Offset Bus Width
User 010 127 1
Goal 010 127 1
Current 010 015 1
Total transfers 119835 (33099 read;86736 written)
blks(512) rd=174929; blks(512) wr=305836
--
Richard W Kaszeta Graduate Student/Sysadmin
bofh@me.umn.edu University of MN, ME Dept
http://www.menet.umn.edu/~kaszeta
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