Re: [nslu2-linux] Which drives do you recommend?
- MrE wrote:
> I'm using a Seagate Pushbutton Backup 350 GB drive, which is *very*Seconded - I've got a pair of the 400GB drives in a RAID1 config - they're
> quiet and spins down by itself; I didn't need to make any config changes
> to get it to spin down.
very nice. Well, except for the fact that you need to hit the power switch to
turn 'em on if the power fails. If I can find a way to get them apart without
breaking them, I'll install a power-on mod of some kind in them. Warranty,
what warranty? :P
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>Brian Wood wrote:Perhaps the Maxtor drives were so unrealiable that Seagate replaced them with their own drives but retained the Maxtor name on the usb case? Just don't buy a old one off ebay or make sure you don't get old stock that been sitting on a self for ages then!
>I got three of the 500GB Maxtor units very cheap on sale. I have removed
>the PATA drives from 2 of them for internal use in other machines. They
>were both Seagate drives, their "best" consumer perpendicular-type >units.
>Perhaps it is the USB case that "gave up the ghost"? Ive had no problems
>with the drives, but they are in properly-cooled cases now, not those
>strange things with the psychedelic lights on the front.
- Chris Watts wrote:
>That's the problem with buying external USB units, you never really know
>>Brian Wood wrote:
>>I got three of the 500GB Maxtor units very cheap on sale. I have removed
>>the PATA drives from 2 of them for internal use in other machines. They
>>were both Seagate drives, their "best" consumer perpendicular-type >units.
>>Perhaps it is the USB case that "gave up the ghost"? Ive had no problems
>>with the drives, but they are in properly-cooled cases now, not those
>>strange things with the psychedelic lights on the front.
> Perhaps the Maxtor drives were so unrealiable that Seagate replaced them
> with their own drives but retained the Maxtor name on the usb case? Just
> don't buy a old one off ebay or make sure you don't get old stock that
> been sitting on a self for ages then!
what's inside. Usually you can't even tell if it is a SATA or a PATA
drive, but that matters only if you're going to rip it out I guess.
I've often seen external units selling for less than a same-sized bare
drive. I think the reason is the makers can throw whatever they sweep up
off the floor into those cheap USB cases and the buyers will be happy as
long as the capacity is close to what's on the box. Issues like speed,
latency etc. are all made academic by the USB interface.
Also, the market seems to want SATA units these days, and the external
boxes are a way to get rid of excess PATA drives.
I tried to buy a 20 or 40 GB the other day, all I really needed was 2GB
to hold an OS. Of course the smallest I could easily find was 160GB.
Of course if you want to buy a *real* hard drive (Ultra-320 SCSI at
15,000 RPM) you still pay through the nose. Quality always costs, but is
usually worth it in the end.
- --- In email@example.com, "pezmannen_77" <pezmannen_77@...>
>i like seagate because most of their products have a 5 year warranty.
> I'm gonna buy the nslu2 next week. First i decided to by a MyBook
> 500gb from WD, but reading the Wiki and here has made be reconsider.
> Looks to me that nobody has managed to spindown these drives?
> At some point, if your spun-down time is short enough, you are actuallyThat's true, but only just. Here are some numbers from a Seagate
> damaging the planet more by spinning down as the startup surge might
> exceed the savings.
datasheet; I suspect that other drives are similar:
Idle: 7.2 W
Peak: 33.6 W
How long does it take to spin up? Let's say 3 seconds. 3 x 33.6 is
near enough 100 J, which is about what it takes during about 14 seconds
idling. So you save power overall as long as your average period of
time spun down is greater than about 14 seconds. Surely no-one would
set a spin-down time short enough to see that sort of average behaviour.
The Seagate datasheet also quotes "50,000 contact start-stops" in its
"reliability" section; I don't really know what that means, but maybe
it means spin down/up cycles. If you want the drive to last 5 years of
24/7 operation, that's about one start-stop per hour.
If I were still using disks (which I'm not - no moving parts here
except the keyboard and the printer) I would probably choose a spin
down period of the order of 10 to 30 minutes.