Date: Thu, 29 Dec 2011 14:19:49 -0800 (PST) From: UFS User <ufs.user@yahoo.com> To: "freebsd-fs@freebsd.org" <freebsd-fs@freebsd.org> Subject: RE: Painted into a corner with i386 system and big FS ... Message-ID: <1325197189.54564.YahooMailNeo@web140413.mail.bf1.yahoo.com> In-Reply-To: <1325197128.44125.YahooMailNeo@web140420.mail.bf1.yahoo.com> References: <1325190659.66676.YahooMailNeo@web140408.mail.bf1.yahoo.com> <20111229214059.GA4452@icarus.home.lan> <1325197128.44125.YahooMailNeo@web140420.mail.bf1.yahoo.com>
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Thanks for this response - see comments below... > It appears that this is impossible to fsck - I have nudged up maxdsiz all the way to: > kern.maxdsiz="3072000000" > > and it's not enough. ?Any larger values cause the system to become unbootable. > So, my plan is to boot 8.x amd64 FIXIT, and run fsck from the fixit environment. > The issues I foresee are: > > 1. Do I need to specify a maxdsiz in the 8.x fixit environment, or does this all just autoscale > these days ? > It does not autoscale. You will need to set it manually at the loader > prompt by entering 'set kern.maxdsiz="3072000000"' then 'boot'. Ok, great. And it's the same old process: Type '?' for a list of commands, 'help' for more detailed help. OK set kern.maxdsiz="3572000000" OK boot Yes ? > 2. There is only 4 GB of physical in the system ... if I could grow to 3.072 GB process size in > i386, then all else being equal, I should be able to grow to 3.5 in 8.x FIXIT, right ? (snip) >The 3.5GB value you came up with is equally as amusing. How much you >actually get greatly varies on hardware details and so on. Your >motherboard manufacturer should be able to tell you how much you'll get, >as long as you provide them a full list of any PCI/PCI-X/PCIe devices >you have installed in slots, and any system features you have enabled >(AHCI, on-board SCSI, etc.). Oh, sorry for the confusion - the installed OS is freebsd i386, BUT the underlying system is in fact a 64bit system. It is the physical inaccessibility, and other logistical issues that prevent us from just upgrading the entire OS, etc. So I will boot amd64 FreeBSD 8.x FIXIT, and will be running in a proper amd64 architecture, but the limitation is I only have 4 GB physical ram. So I am hoping that, all else being equal, if i386 can only see (from dmesg): real memory = 3489071104 (3327 MB) avail memory = 3414245376 (3256 MB) then an amd64 system would see (roughly) 500 megabytes more memory than that, and the 3.072 GB process size I get on i386 will then be (roughly) 3.572 on amd64. A reasonable guess ? I hope I don't have to swap, but if I do, presumably this will only grow to 3.8 or 4.0 or 4.2 GB in process size, so that's just the last 1/8 of the job that will be slow... Thanks again.
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