From owner-freebsd-current  Sun Jan  7 17:54:28 2001
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From: Salvo Bartolotta <bartequi@inwind.it>
To: freebsd-current@freebsd.org
Subject: SCSI CD recorder no longer attached; minor issues
Date: Mon, 8 Jan 2001 02:55:06 +0100
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Dear FreeBSD'ers,

I am running -CURRENT as of today (sources as of ~ 18:15 GMT). I can 
see the following (a # sign precedes my comments):

Waiting 15 seconds for SCSI devices to settle
Mounting root from ufs:/dev/ad2s1a

# YAMAHA CRW4416S: it is correctly recognized by -STABLE.
# OTOH, the archives seem to report just *minor* SCSI issues.  
(cd0:ahc0:0:3:0): READ CD RECORDED CAPACITY. CDB: 25 0 0 0 0 0 0 0 0 0
(cd0:ahc0:0:3:0): error code 0
(cd0:ahc0:0:3:0): fatal error, failed to attach to device
(cd0:ahc0:0:3:0): lost device
(cd0:ahc0:0:3:0): removing device entry

# My cd player works
cd1 at ahc0 bus 0 target 6 lun 0
cd1: <PLEXTOR CD-ROM PX-40TS 1.00> Removable CD-ROM SCSI-2 device
cd1: 10.000MB/s transfers (10.000MHz, offset 15)
cd1: Attempt to query device size failed: NOT READY, Medium not present

# It is unusual on this system
pcm0: hwptr went backwards 20 -> 12
pcm0: hwptr went backwards 2072 -> 2048
pcm0: hwptr went backwards 2184 -> 2048
pcm0: hwptr went backwards 20 -> 0
pcm0: hwptr went backwards 2068 -> 2048
pcm0: hwptr went backwards 2240 -> 2048
pcm0: hwptr went backwards 20 -> 0
pcm0: hwptr went backwards 20 -> 0
pcm0: hwptr went backwards 20 -> 0
pcm0: hwptr went backwards 20 -> 0
pcm0: hwptr went backwards 20 -> 0
pcm0: hwptr went backwards 2204 -> 2048
pcm0: hwptr went backwards 20 -> 0
pcm0: hwptr went backwards 2068 -> 2048
pcm0: hwptr went backwards 2068 -> 204




I forgot to reboot via 'shutdown -r now' *sigh*
On a couple of subsequent occasions, however, shutdown -r now was timed 
out, and no entropy file was created; 'dd if=/dev/random of=/entropy  
bs=4096 count=1' (within the shutdown sequence) did NOT create 
anything. 

In s.u.m., I issued it as an ordinary explicit command, but it stalled. 
So... workaround:  'dd if=/dev/urandom of=/entropy  bs=4096 count=1'.  
Then /dev/random, asked again to do its duty, helped dd (to) create  an 
entropy file. 

I was wondering whether such a sanity check would be worth adding (in 
rc.shutdown ?)  in order to prevent the above entropy (minor) issue. 
Does this make sense at all? Is this just a little temporary problem ? 

Thanks for your patience and best regards,.
Salvo


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