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- Path: sparky!uunet!spool.mu.edu!olivea!xenitec!news
- From: belal@sco.COM (Bela Lubkin)
- Newsgroups: biz.sco.general
- Subject: Re: Results of testing dd
- Message-ID: <9212231035.aa05083@scoke.sco.COM>
- Date: 23 Dec 92 18:35:39 GMT
- Sender: news@xenitec.on.ca (xenitec.on.ca News Administrator)
- Organization: [resent by] The SCOGEN gateway and Propagation Society
- Lines: 59
- Resent-From: mmdf@xenitec.on.ca
- Submit-To: scogen@xenitec.on.ca
- Cc: consult!bob@uunet.UU.NET
- Precedence: bulk
-
- Bob Willey wrote:
-
- > NOTE: Where do you get the above utility???? ^^^^^^^ SCSICNTL.EXE
- > I have looked on Adatpec's BBS, Seagate's, Quantum's, and ours
- > and did not find this utility. Also checked several other BBS's
- > and could not locate it.
-
- It is an Adaptec utility, written by Roy Neese, one of their engineers.
- However, Adaptec does not support it and you won't find it on their BBS.
- You can UUCP it from Roy's UNIX box. Following is from my Systems file,
- but do note that I haven't tried to connect to adaptex in over a year,
- so this may no longer be the right phone number:
-
- adaptex Any ACU 2400 18174886893 "" \d\d\d gin:-BREAK\d\d\d-gin:-BREAK\d\d\d-gin:-BREAK\d\d\d-gin: suucp
-
- > > OLD MACHINE NEW MACHINE
- > > 386/33 w/8mb memory 64kcache 486/DX266 w/16mb memory 256k cache
- > > Ultrastor 12F ESDI controller Adaptec 1542 SCSI controller
- > > Maxtor 338mb drive (~ 16ms) HP 667 SCSI-2 drive (~13ms)
- > > SCO Xenix 2.3.2 SCO Xenix 2.3.4 GT
-
- > -----Old System------ -----New System------
- > DEVICE BLOCKSIZE COUNT REALTIME USER KERNEL REALTIME USER KERNEL
- > ====== ========= ===== ======== ==== ====== ======== ==== ======
- > rhd0a 2k 8192 25.4 0.2 5.0 1:06.2 0.0 3.1
- > hd0a 2k 8192 38.3 0.5 15.1 59.0 0.2 27.0
- > rhd0a 256k 64 25.6 0.0 3.8 N/A
- > hd0a 256k 64 25.6 0.0 12.9 N/A
- > rroot 2k 8192 26.8 0.3 5.0 1:06.1 0.0 3.7
- > root 2k 8192 34.4 0.5 15.6 58.8 0.1 27.5
- > rroot 256k 64 25.9 0.0 3.8 N/A
- > root 256k 64 25.9 0.0 13.0 N/A
- > rhd00 2k 8192 25.4 0.5 4.7 1:07.1 0.0 4.1
- > hd00 2k 8192 34.7 0.5 14.5 58.8 0.2 27.1
- > rhd00 256k 64 25.7 0.0 3.7 N/A
- > hd00 256k 64 27.0 0.0 13.1 N/A
-
- > Note: You will notice on the New System (SCO Xenix 2.3.4) the dd
- > command gave us an error: dd: argument 256K out of range
- > Tried doing 64k and also 262144, but no luck.
-
- Interesting. Copy /bin/dd from your 2.3.2 system to the 2.3.4 system --
- I just verified this, somehow the dd binary on 2.3.4 is an 8086 binary
- that won't do large transfers, while the one on 2.3.2 is a 386 binary
- that isn't limited. This appears to be a product engineering bug in
- 2.3.4.
-
- > Obviously something
- > is still not setup correctly on the NEW SCSI-2 system with the
- > Adaptec 1542B controller. We really need to get our hands on the
- > SCSICNTL.EXE program so we can see what is going on.
- > Thanks for everyone's help and assistance.
-
- Could be the drive. Could also be that the Ultrastor 12F does track
- caching better than the 1542B. I predict that SCSICNTL will let you
- turn on some on-drive caching in the HP SCSI drive which will make it
- remarkably faster.
-
- >Bela<
-