From owner-freebsd-hackers  Mon Oct  9 08:46:08 1995
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Message-Id: <199510091546.JAA10702@rover.village.org>
Subject: Re: VLB Disk Controllers 
To: hackers@FreeBSD.ORG
In-reply-to: Your message of Mon, 09 Oct 1995 16:31:42 BST
Date: Mon, 09 Oct 1995 09:46:01 -0600
From: Warner Losh <imp@village.org>
Sender: owner-hackers@FreeBSD.ORG
Precedence: bulk

Here's my numbers from a couple of old disks and an UltraStore 34F
under FreeBSD 2.0R:

QUANTUM LP240S:

rover:[358]> ./disklate /dev/rsd0a
Command overhead is 3978 usec (time_4096 = 4635, time_8192 = 5292)
transfer speed is 6.23331e+06 bytes/sec
rover:[359]> ./disklate /dev/rsd0a
Command overhead is 4090 usec (time_4096 = 4880, time_8192 = 5671)
transfer speed is 5.18336e+06 bytes/sec
rover:[360]> ./disklate /dev/rsd0a
Command overhead is 3235 usec (time_4096 = 4626, time_8192 = 6018)
transfer speed is 2.94308e+06 bytes/sec

SEAGATE ST3655N:

rover:[363]> ./disklate /dev/rsd1a
Command overhead is 3693 usec (time_4096 = 4686, time_8192 = 5680)
transfer speed is 4.12306e+06 bytes/sec
rover:[364]> ./disklate /dev/rsd1a
Command overhead is 3960 usec (time_4096 = 4849, time_8192 = 5738)
transfer speed is 4.60575e+06 bytes/sec
rover:[365]> ./disklate /dev/rsd1a
Command overhead is 3684 usec (time_4096 = 4766, time_8192 = 5848)

Warner