News Group Posts

warnings vs. notices

My memory of this is that it happens every time the drive is accessed. I've never been able to convince a customer to just "ignore it" though..

My feeling is to silence it. If the drive fails, you either know it because it failed completely or you start getting flaky verification errors. If it supports TapeTell then you can get more info from that anyway.
--Tony Lawrence

From: Ian Wilson <scobloke2@infotop.co.uk>
Subject: Re: "Unexpected SCSI phase change" messages after Tape-Drive replaced.
Date: Tue, 6 Sep 2005 08:59:24 +0000 (UTC)
Message-ID: <dfjlpc$8fc$1@nwrdmz01.dmz.ncs.ea.ibs-infra.bt.com> 
References: <dfh7a2$fhr$1@nwrdmz03.dmz.ncs.ea.ibs-infra.bt.com>
<c4GdnUJZK7cZz4HeRVn-sw@comcast.com>
<dfhpni$cb5$1@nwrdmz03.dmz.ncs.ea.ibs-infra.bt.com>
<200509051328.aa13052@deepthought.armory.com> 

Bela Lubkin wrote:
> Ian Wilson wrote:
> 
> 
>>Tony Lawrence wrote:
>>
>>>Ian Wilson wrote:
>>>
>>>
>>>>I replaced a failed SCSI tape drive on an OSR507 system and 
>>>>subsequently get this message at start-up:
>>>>
>>>>NOTICE: cha: SCSI bus has been reset ha=1
>>>>        Attached SCSI peripherals will return to power up state \
>>>>        (cha N04)
>>>>NOTICE: cha: Unexpected SCSI phase change \
>>>>        ha=1 id=6 lun=0 cmd=12 blk=0 len=36
>>>>        A SCSI peripheral behaved unexpectedly
>>>>        Use Compaq diagnostics to confirm a hardware failure \
>>>>        (chaN02)
>>>
>>>http://aplawrence.com/SCOFAQ/FAQ_scotec6cha.html  ?
>>
>>Doh! I should have looked there before posting.
>>Thanks Tony.
> 
> 
> The advice it gives:
> 
>   "int cha_print_warnings=0;"
> 
> seems a little questionable to me.  You don't know what other warnings
> it might turn off (media error messages?  "The controller hardware
> reports it's about to die"?)  I recommend leaving the warning on and
> simply ignoring it.
> 

Ideally you'd be able to suppress notices and still receive warnings.

I looked in /etc/conf/pack.d/cha/space.c and found this:

     /*  Should NOTICE messages from the driver be printed?
         Each possible NOTICE message is associated with one
         bit in cha_print_notices.  The value -1 turns on all the bits.
         The value 0 suppresses all NOTICE messages.
         To turn off message CHAN03, turn off bit 03.
      */
int cha_print_notices = -1;     /* 0 to supress all notices */

Tony - you might like to update the SCOFAQ?  If I get time, I'll try 
setting cha_print_notices to 0 and report back here.

The documentation (man HW cha) says "Although they may be recoverable, 
you should attempt to determine their root cause and correct it." I 
don't think I want to play around with the hardware too much.

I'll just ignore the messages for now.
 

Comments?

Jump to Comments

Many of the products and books I review are things I purchased for my own use. Some were given to me specifically for the purpose of reviewing them. I resell or can earn commissions from the sale of some of these items. Links within these pages may be affiliate links that pay me for referring you to them. That's mostly insignificant amounts of money; whenever it is not I have made my relationship plain. I also may own stock in companies mentioned here. If you have any question, please do feel free to contact me.

Specific links that take you to pages that allow you to purchase the item I reviewed are very likely to pay me a commission. Many of the books I review were given to me by the publishers specifically for the purpose of writing a review. These gifts and referral fees do not affect my opinions; I often give bad reviews anyway.

We use Google third-party advertising companies to serve ads when you visit our website. These companies may use information (not including your name, address, email address, or telephone number) about your visits to this and other websites in order to provide advertisements about goods and services of interest to you. If you would like more information about this practice and to know your choices about not having this information used by these companies, click here.