[mythtvnz] CompactFlash to SATA adapters for /

[Joel Wiramu Pauling]

May I just add,

that event the fastest CF and SDHC cards are much much slower than
platter hard drives.

The number X given on them (150X, mid -top of the line) is actually
the multiplier of the speed of a single speed CD-ROM drive.

i.e 150 KiB/s

so max read/write out of SDHC or CF cards is nowhere near that of SATA
or IDE disks.

They do get some advantage in terms of I/O but minimal given that even
cheap SATA discs are now averaging around 70-100 IOp/s.

For some perspective: enterprise SATA/SAS drives and Ultrascsi IOp/s
are in the 150-300 range which is why your proliant server disk from
HP is 2k$ as opposed to 200$ for the equivalent consumer SATA disc.

Just get a proper SSD.

On 30 November 2010 16:39, Ross Williamson <ross at inertia.net.nz> wrote:
>> Why use SATA when IDE are cheaper and work probably just as well?  No
>> IDE on the motherboard?
>
> That's often the case. The IDE adapters can be had for about $10 less
> than the SATA ones IIRC.
>
>> I would have thought that 8G would be sufficient for a frontend and
>> that thereofre $56 per this auction (chosen at random, no connection
>> to the seller etc etc) would do the trick:
>>
>> http://www.trademe.co.nz/Computers/Components/Hard-drives/Other/auction-335633407.htm
>
> This is about what one ends up paying when you buy the adapter + CF card
> separately.
>
> It's also the same cards that I've used (8GB Kingston Elite Pro) and
> even looks like the same adapter (though mine came with a 2.5" caddy
> surrounding the PCB)
>
> For those wanting to go for the cheaper 4GB cards: it can be done but is
> a bit too tight if you want to perform in-place package upgrades
> (generally the case!). 8GB gives a lot more breathing room.
>
>>>> I would also be interested in seeing the actual price difference between a usefully sized and performant CF + adapter, versus the cheapest SSDs. Noting that a 32GB SSD can be had for under $120 now.
>
> The issue is that SSDs are far too expensive to be used as storage for
> recorded programmes, so generally all they get used for are the
> OS+software. In which case a 32GB SSD is overkill, and at $120 is
> basically twice what you'd pay for the CF solution. Obviously SSDs are
> going to be a lot quicker, however.
>
> Ross
>
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