Date: Thu, 8 Feb 2007 17:29:51 +0300 From: "Andrew Pantyukhin" <infofarmer@FreeBSD.org> To: Fluffles <etc@fluffles.net> Cc: rsh <bsdgroup.md@gmail.com>, freebsd-hardware@freebsd.org Subject: Re: External HDD Message-ID: <cb5206420702080629p237800f2xc80c1c3f3554f3f0@mail.gmail.com> In-Reply-To: <45CB2DE8.1090609@fluffles.net> References: <1170861895.87827.8.camel@localhost> <45CA1107.1020609@fluffles.net> <cb5206420702070958n1b02c5b2w3320ebd779c09791@mail.gmail.com> <45CB2DE8.1090609@fluffles.net>
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On 2/8/07, Fluffles <etc@fluffles.net> wrote: > Andrew Pantyukhin wrote: > > On 2/7/07, Fluffles <etc@fluffles.net> wrote: > >> rsh wrote: > >> > Hi > >> > > >> > For backup purposes, i need removable HDD, connected through USB or > >> > Fireware > >> > > >> > I'm really impressed by Transcend solution and would like to use their > >> > Transcend 1.8" Portable HDD 20 GB, USB 2.0 > >> > It takes power directly from USB. > >> > > >> > Did somebody have success with this device? > >> > > >> > If it is a bad idea, any suggestions for External HDD ? > >> > > >> > Thanks > >> > > >> > >> Why would you want 1,8" ? That is very small indeed, but very limited as > >> well and expensive. You might as well buy a 2,5" (notebook) drive with > >> enclosure, that would just be recognised by FreeBSD as USB mass storage > >> device (umass) and works perfectly with me. Also most 2,5" enclosures > >> allow for USB power so only 1 cable is needed; though often they provide > >> an additional power supply if you use a 7200rpm drive which uses a lot > >> of power. My advice: go for Samsung 5400rpm drives they are very > >> power-efficient and still quite fast. > > > > 1.8"? 2.5"? > > 1,8" are extremely small drives; like compactflash models or so > 2,5" are regular notebook drives -- too very small > 3,5" are, as you know, regular drives. > > The problem is, 3,5" drives use a lot of power (some 30W spinup); you > cannot pull that much from USB cable so external enclosures for 3,5" > drives will have a power adapter; this makes two cables while rsh wanted > just one cable; you can only do that with 2,5" and below. So i recommend > 2,5" drives. Sure, sure, I just wanted to continue the lineup of sizes. Maybe somebody will come up with 5,25" and portable multi-bay NAS solutions :-) BTW, many 2,5" enclosures I've seen require two usb ports, the second one just to get more power. I imagine you could get 30W from 12 dedicated USB ports :-) > > I have a Sarotech Hardbox enclosure for 3.5" > > drives and I prefer using Seagate drives inside. > > Seagate gets rather hot; Samsung is a lot better in that respect. That's what I'm saying, Seagate is hot! But seriously, fanless enclosures are a problem with any drive. Hmm, Samsung 3,5" drives are rather cheap these days, look like a bargain to me. I remember they were regarded as a bit slow, but stable some years ago, wonder if that is still true...
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