Date: Thu, 26 Aug 2004 14:58:05 -0500 From: David Kelly <dkelly@HiWAAY.net> To: FreeBSD_Questions FreeBSD_Questions <freebsd-questions@freebsd.org> Subject: Maximum Transfer Size, ATA, and UFS2, was lowered? How? Message-ID: <3E535423-F79A-11D8-B934-000393BB56F2@HiWAAY.net>
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I have been watching the maximum "KB/t" for devices using "systat -v". A week or two ago prompted by other messages here experimented with "tunefs -m 5 ad0s1f" and very shortly thereafter restored it to the original value of 8. Previously 127 KB/t was often seen for large file actions. Currently seems that the limit has been dropped from 128k to 64k. All I can think that I did was flip the minfree percentage using tunefs from 8 to 5 and back to 8. How can I restore the fs characteristics back to normal? System is 5.2.1-p9. More possibly useful information: # bsdlabel /dev/ad0s1 # /dev/ad0s1: 8 partitions: # size offset fstype [fsize bsize bps/cpg] a: 524288 0 4.2BSD 2048 16384 32776 b: 4140688 524288 swap c: 241248042 0 unused 0 0 # "raw" part, don't edit d: 524288 4664976 4.2BSD 2048 16384 32776 e: 524288 5189264 4.2BSD 2048 16384 32776 f: 235534490 5713552 4.2BSD 2048 16384 28552 # dumpfs -m /dev/ad0s1f # newfs command for /dev/ad0s1f (/dev/ad0s1f) newfs -O 2 -U -a 8 -b 16384 -d 16384 -e 2048 -f 2048 -g 16384 -h 64 -m 8 -o time -s 58883622 /dev/ad0s1f -- David Kelly N4HHE, dkelly@HiWAAY.net ======================================================================== Whom computers would destroy, they must first drive mad.
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