Date: Thu, 25 Feb 2010 21:16:16 -0800 From: Garrett Cooper <yanefbsd@gmail.com> To: FreeBSD-Hackers <freebsd-hackers@freebsd.org> Subject: ddb and dump devices Message-ID: <7d6fde3d1002252116k55a8e350s5dcc0846cba07785@mail.gmail.com>
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Hi again Hackers, Another question that popped up recently in my mind given some of the stability issues with RAID controllers is: what happens when you can't dump to a RAID or non-RAIDed PATA/SATA device? In particular, does it make sense to have the functionality where one could make the dump/panic operation fault resistant where the person could get a `freebie' and use an alternate device, like USB thumbdrives, tapedrives (not saying that'd be smart), or a network device to dump the data? I realize that not all cases are recoverable and there will be some coverage gaps still, but it'd be nice if we could fill in the gaps that do exist when stuff goes horribly south. This functionality would be helpful for my company at least (Ironport) as disk RAIDs sometimes fail and we don't have a means of writing back data, and we don't always have serial connectivity on our appliances and our customers typically don't in the field, s.t. we can use kgdb on the machine and get more useful tracebacks from panic conditions. Please let me know what you think and whether or not this is a worthwhile endeavor. Thanks! -Garrett
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