Date: Wed, 30 May 2012 19:44:37 +0200 (CEST) From: Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl> To: Matthias Apitz <guru@unixarea.de> Cc: freebsd-hackers@freebsd.org, rozhuk.im@gmail.com Subject: Re: proper newfs options for SSD disk Message-ID: <alpine.BSF.2.00.1205301938070.17367@wojtek.tensor.gdynia.pl> In-Reply-To: <20120527082745.GA2591@tinyCurrent> References: <alpine.BSF.2.00.1205182209010.9350@wojtek.tensor.gdynia.pl> <4fb7dfd6.736a980a.186d.ffff902f@mx.google.com> <20120519180901.GA1264@tiny> <20120525183006.GA1259@tiny> <alpine.BSF.2.00.1205252240260.31165@wojtek.tensor.gdynia.pl> <20120525225839.GA7347@server.rulingia.com> <alpine.BSF.2.00.1205261550110.70207@wojtek.tensor.gdynia.pl> <20120527082745.GA2591@tinyCurrent>
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> ... > # geli attach /dev/md1 > Enter passphrase: > # dd if=/dev/md1.eli of=/dev/null bs=128k count=4k > 536868864 bytes transferred in 35.093015 secs (15298454 bytes/sec) > # dd if=/dev/zero of=/dev/md1.eli bs=128k count=4k > 536868864 bytes transferred in 38.044995 secs (14111419 bytes/sec) > # geli detach /dev/md1 > # mdconfig -d -u 1 > > As you can see the EeePC with it's Intel Celeron CPU of only 900 MHz is > even faster then the Acer with Atom CPU; yes this is normal. Intel Atom have low IPC, but high IPJ (instruction per joule, still low compared to ARM). Yet - if you have hyperthreading it is actually not bad in IPC too with 2 threads. I generally think intel atom is great x86 processor as you simply do not need more power for PERSONAL computer. > BTW: On the EeePC I run 10-CURRENT, KDE 3.5.10 and never encounter > performance issues while reading, writing etc. right. It is normal. Even KDE is not that really that CPU bound, but still useless. > Concerning your hint installing the systen on the second SSD of around > 16 GByte (marketing GBytes :-)), the BIOS by itself is unable to boot right. 16 billion bytes. A simple marketing trick to cheat you for 7.6% > from; one has to go (by pressing ESC) to the boot menu to pick it up as > current boot device; any idea how this could be changed? boot from 4GB. just put /boot here and add vfs.root.mountfrom="ufs:XXX" where XXX is your root filesystem device name with "/dev/" stripped do not forget to bsdlabel -B your.4GB.SSD WARNING: you must have proper disklabel with a: partition containing UFS with /boot. But you may have a partition equal to whole disk a: 117231408 0 4.2BSD 0 0 0 c: 117231408 0 unused 0 0 # "raw" part, don't edit and it is absolutely OK, UFS do not overwrite first few sectors as it is reserved for it. And PLEASE DO NOT make this stupid MSDOS style slices. It is not just unneeded but introduces mess and only mess. just have /dev/ad0a not /dev/ad0s1a
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