schrieb Martin Sugioarto am 14.02.2012 19:23 (localtime): > Am Tue, 14 Feb 2012 18:17:19 +0100 > schrieb Harald Schmalzbauer <h.schmalzba...@omnilan.de>: > >>> I find it interesting that, at least so far, the only people >>> reporting problems of this type with the ahci.ko driver are people >>> using Samsung disks. The only difference is that your models are >>> F1s while the OPs are F2s. >> I saw such timeouts long ago and mav@ had a look at my postings and he >> mentioned it could be a NCQ problem. >> I suspected the disks firmware. >> I never tracked it down further, because after replacing the Samsung >> (F3 in that case) disks with hitachi ones solved all my problems and >> gave a big performance kick as well (with zfs). >> You can find the discussion here: >> http://lists.freebsd.org/pipermail/freebsd-stable/2010-February/055374.html > Hi, > > I just want to add here that I am using 2 drives of type "Samsung > HD103SJ" (SpinPoint F3). And I did not have problems with ZFS and with > UFS either (for several years now). Everything has been deployed ontop > ada(4) since FreeBSD-8. > > Actually the speed is very good (sequential read at 140 MB/s and more).
I guess it's always the firmware of the EcoGreen models which cause these problems. Your drive isn't EG... I don't remember exactly the different model numbers, but I'm sure they were all EcoGreen. The lower power consumption was the reason to choose these specific drives (different capacities and F2/F3 series tried), with acceptable performance loss - I thought. But it turned out that EcoGreen and NCQ as well as RAIDZ demands dont' fit together... -Harry
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