Date: Sat, 13 Mar 2010 14:37:34 +0100 From: "Thomas Schmitt" <scdbackup@gmx.net> To: freebsd-hackers@freebsd.org Subject: Re: How to slow down SATA to 1.5 GBit/s ? Message-ID: <106107651416886@192.168.2.69> In-Reply-To: <201003122101.o2CL1I7s028001@triton8.kn-bremen.de> References: <201003122101.o2CL1I7s028001@triton8.kn-bremen.de>
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Hi, Juergen Lock gave me a lot to read about > ahci(4) on FreeBSD >= 8.0 The proposed solution points me to a third way how a contemporary burner can be driven by FreeBSD. The purpose of my FreeBSD installation is to improve libburn on FreeBSD and to provide support for FreeBSD users. I.e. i want to run a contemporary production system with all possible variations of drive attachment. My idea was to use the same burner via USB and via eSATA alternatively. So even if i get ahci running i would still need a solution for ata. (If there is none, then i will have to put the drive into the computer and use SATA without "e". No easy switch to USB then.) ------------------------------------------------ I will nevertheless try to get my fstab ready for ahci and to learn how to boot with that. After all, it seems to be the upcomming driver for SATA. Not being a skilled sysadmin i wonder whether this hint by Juergen announces trouble: > (you still have to take care of swap manually then tho, and dumpdev in > rc.conf if you have it set explicitly.) The machine is generously equipped with RAM. Vanilla installation from 8.0-RELEASE-amd64-dvd1.iso.gz plus some ports around CD/DVD/BD burning. Installation was easy. :) Can it be that it doesn't have any swap ? # swapinfo Device 1K-blocks Used Avail Capacity # vmstat procs memory page disks faults cpu r b w avm fre flt re pi po fr sr ad4 cd0 in sy cs us sy id 0 0 0 435M 3711M 64 0 0 0 56 0 0 0 2 94 448 0 0 100 Nothing gets found by # fgrep dump /etc/rc.conf Is that a good sign ? > HTH, :) It helped to expand my todo list, in any case. I was not aware of those aspects at all. Many thanks for your advise. Have a nice day :) Thomas
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