Date: Thu, 21 Mar 2002 15:22:54 -0800 From: Terry Lambert <tlambert2@mindspring.com> To: mwest@umem.com Cc: freebsd-hackers@freebsd.org Subject: Re: a 250Meg ramdisk Message-ID: <3C9A6B4E.354EDBB7@mindspring.com> References: <001f01c1d111$cb03aef0$0600a8c0@www.umem.com>
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mwest wrote: > Would anyone know if how to pre-load modules of type `md_image' is > documented anywhere? > > I'm trying to create a 250Meg ramdisk , but have only managed one of 10 > Meg so far . > > So far what I can surmise is that it has to be done in loader.conf: > > 1) Setting [mfs_load="NO"] to YES > 2) Somehow indicated I want 250Meg for a memory disk as hinted to by one > of the last paragraphs of the md MAN page. > > "the md driver will search for pre-loaded modules of type > `md_image' and instantiate a md device for each of these modules. The > type `mfs_root' is also allowed for backward compatibility. These > devices are backed by the RAM reserved by the loader(8), and as such not > limited by the malloc(9) size constraints" The loader itself uses BIOS calls. THere is a 16M limitation on size. Probably, you don't want to do a pre-loaded version of the RAM disk anyway, if you want it taht large: you are trying to have a large read/write space for running a system, right? You want ot establish MFS's after the system is up. -- Terry To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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