Root Access

Bob

01:22

Is there anyone here familiar with Intel RST?

Hennes

/

@Bob No, I succesfuly avoided it.

35/38 MB/sec seems slow though.

I downloaded portable version, trying it now on mostly free disk.

Sequential read: 90.33MB/sec. Lower than I had hoped. :(

Hennes

01:47

These are th4e values I got while running the same prog as in your question on a single drive

Hennes

01:59

That is on a 4 drive RAID 5 (I know, not a safe idea to use large drives with RAID5. Not if you want to rebuild them on failure).

Both however have higher seq. reads then seq. writes. Which is not true for your question.

Which indeed puzzles me

Hennes

02:41

I guess :7000170 just dropped in for a minute :(

Journeyman Geek

03:18

nice. I e mailed comgateway asking if my payment went through. They e mailed me on a sunday,... and upgraded my shipping for free o0

Bob

03:40

@Hennes makes sense if write cache is enabled

but that appears to be the inverse of the setting

which is very weird

@Hennes I went out to buy some SATA cables :\

Hennes

Somehow I always had more SATA cables than I needed. Motherboards used to come with half a dozen of them.

Usually I wished they shipped with less and where a but cheaper.

Bob

@Hennes ... ... ...

mine only came with two

Hennes

I think most of my boards came with 6 or 8

Bob

and with 6 2.5" bays and 6 5.25" bays (and one eSATA), I really need more

not that all the bays are filled

our other computers are either preassembled (Dell...), laptops or too old to have SATA ports

Hennes

I still do not grok why your write speed is so much higher then other speeds.

In a mirrror you write to both drives. So the limit is the write speed of a drive. And 166MB/sec would be nice. Great even for a 5900 RPM drive. But read speeds at 35 or 38MB/sec. That belongs to an old, slow drive

Bob

03:47

@Hennes it's probably writing to the cache

Hennes

Aye, but the cache needs to be flushed.

Bob

the read speed is just sad

@Hennes Don't ask me :P

I'm the one asking the question

Journeyman Geek

XD

Hennes

Unless you have more free memory/disk buffer than your test data, the buffers should just fill up, and then things slow down to disk speed

Bob

hm

I was doing a 500MB test

if it's caching in RAM for whatever reason...

but then, RAM is not nearly that slow

Hennes

03:50

Yes, but say to got 1GB RAM, maybe 800MB free. If I copy 2TB (or any amount way bigger then those 800MB free RAM) it will start to fill those 800MB. Once that buffer is full it can not accept more without writing it.

Cache access to RAM is orders of magnitude faster

Bob

@Hennes Yes, but I have 8 GB of RAM. If this were a RAM cache with no size limit, this would not be so slow (100MB/s is slow for RAM... isn't it?)

Hennes

100MB/sec is HDD speeds. RAM is literally orders of magnitude faster

Bob

as for the 35MB/s, when I say 5900RPM i meant "green"

Journeyman Geek

eww

Bob

...which is why I'm going to replace them with nice shiny 7200RPM drives :P

in fact, I'l go do that now

Journeyman Geek

03:53

ooh

Bob

if I suddenly disappear, that means the RAID failed :(

Journeyman Geek

they are releasing a minecraft port for the raspberry pi

Bob

ok, hot plugging, let's go

Journeyman Geek

considering it has trouble running on some modern laptops...

Bob

@JourneymanGeek o.O

server or client?

Journeyman Geek

03:55

apparently client

though I suspect its a port of the phone version

Bob

ok.. wut.

Hennes

Assuming reasonably standard memory (say DDR3-1333, not to old, not to new) you have a bandwidth of 10666MiB/sec.

Journeyman Geek

games.slashdot.org/story/12/11/24/2334209/…

Bob

@Hennes sounds about right from my last memtest

ah crud

Journeyman Geek

ahh makes sense

Bob

03:56

why are my SATA ports under my graphics card?!

Hennes

Because that way you can load movies really fast. :)

Seriously though: WTF. Why not at the edge of a motherboard.

Bob

@Hennes they are

just happen to be at the end of the PCIe x16 slot

which happens to have a slightly long graphics card in it

Hennes

I think I got all my SATA ports at the edge of the motherboard. Out of the way of add-in card. Good for cable management. Hard tor each once the case is assembled

"The amusing 'but does it run Crysis?' question has a cousin:

Huh

When was that ever amusing?

Bob

my case is a mess of cables

oh, so that one is port 1

heh, unplug random disk and let RST tell me which it is cause I can't read the port markings on the MB

oh damn

I bought the SATA cables but forgot the molex to sata power adaptors

Hennes

The last time I unplugged drives (to vacuum clean the case) I marked which cable they where on. I messed up.

Luckily it did not matter to which cable I connected them.

Bob