From owner-freebsd-hackers  Fri Jun 28  0:46:27 2002
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From: Dirk-Willem van Gulik <dirkx@webweaving.org>
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To: freebsd-hackers@freebsd.org
Subject: How noisy should ch(4) be ?
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On a stock 4.5-RELEASE I get *lots* of

Jun 28 11:37:53 amanda /kernel: ch: warning: could not map element source
	address 40384d to a valid element type

as soon as chio touches the tape changer. 

How noisy should ch(4) be - is this normal ? Previous experience with a
SONY DAT library and a seagate was more silent :-)

Device details:

camcontrol devlist
	<Quantum DLT4000 CD3C>             at scbus0 target 4 lun 0 (pass0,sa0)
	<Quantum DLT4000 CD3C>             at scbus0 target 5 lun 0 (pass1,sa1)
	<HP C1194F 1.03>                   at scbus0 target 6 lun 0 (pass2,ch0)

dmesg
	Waiting 5 seconds for SCSI devices to settle
	sa0 at ahc0 bus 0 target 4 lun 0
	sa0: <Quantum DLT4000 CD3C> Removable Sequential Access SCSI-2 device 
	sa0: 10.000MB/s transfers (10.000MHz, offset 15)
	sa1 at ahc0 bus 0 target 5 lun 0
	sa1: <Quantum DLT4000 CD3C> Removable Sequential Access SCSI-2 device 
	sa1: 10.000MB/s transfers (10.000MHz, offset 15)
	ch0 at ahc0 bus 0 target 6 lun 0
	ch0: <HP C1194F 1.03> Removable Changer SCSI-2 device 
	ch0: 3.300MB/s transfers
	ch0: 28 slots, 2 drives, 1 picker, 1 portal

kernel config

# cat AMANDA
	..
	device          ahc             # AHA2940 and onboard AIC7xxx devices
	device          scbus           # SCSI bus (required)
	device          sa              # Sequential Access (tape etc)
	device          ch              # SCSI media changers

thanks !

Dw


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