...this guy.. benchmarking lossless compression formats on heavily (lossily) compressed videos... then complaining that the compression ratios aren't worth the extra time... facepalm
ah, maybe I misremembered. Looks like LZMA beats bzip2 by the greatest margin with (somewhat random) binary data. more than (much more predictable) text, anyway
How does RAID work? Is it implemented at BIOS level and the OS sees only a single HD, or is it implemented at OS level and you configure settings at the OS and use tools to manage it?
This is a Canonical Question about RAID levels.
What are:
the RAID levels typically used (including the RAID-Z family)?
deployments are they commonly found in?
benefits and pitfalls of each?
@ruda.almeida: there's hardraid (a card that handles it) softraid (like linux mdm) and fakeraid (which is a mix of hardware and software, and is best avoided, since its tied to a specific piece of hardware)
If you use a motherboards RAID then make sure that it also works on another motherboard. Else if the board dies you loose your data (or rather, everything since your last backup).
Same is true for a HW RAID card, but those are easier to replace.
like greyhole (which is 'simple' and sits over whatever you have), or ZFS (which can be a lot of work to get 'perfect', can require more resources depending on features) etc ect
@ruda.almeida: "Just a bunch of disks"
@Bob: you do. But its an addon card. Good luck finding an identical 10 year old motherboard? ;p
@JourneymanGeek I'm considering FreeNAS, I've been recommended it. It uses ZFS, so is it a software RAID that can be used (and swapped) on any hardware safely?
for some reason the RAID-0 on my desktop with an Adaptec 6405E hardware RAID controller and 2 x 4TB 6Gb/s HDDs is really slow. Well -- I don't mean slow slow -- just, for having two disks working together, it's just about as fast as one disk. I think the write speed is better, but the read speed sure as hell isn't
@allquixotic I got the same problem, only go on here when at work so unless i make an effort to login on the weekends from home i'll never get close...
right now my problem with my HDDs isn't so much the boot up time, and I'm very satisfied with the write speed when recording video with FRAPS (I think it does like, 2 or 3GB/minute at full FPS and resolution) -- the problem is I want to improve loading times in large games.
Maybe I should buy a smallish SSD (256 GB) and load the top 10 games I play into that, and occasionally shuffle out games I'm done with and shuffle in games I want to play
@Bob no, I'm sure they're I/O bound -- I profiled it -- the CPU was at 9% usage, the network was only transferring a couple kilobytes per second, the GPU was at 10% activity (for reference, it's at 30% when rendering the game world), and the disks were churning out megabytes per second of textures and audio from disk
@Bob good point... I forgot to reinstall my license of Raxco PerfectDisk
I'll defrag, but I doubt that's the issue, it's a fairly new install (I installed this Win8 Pro after completely wiping the HDD's partition table and installing it fresh on the day after Win8 general availability)
I updated the firmware in my RAID controller; I consider that fairly up to date :P I have the latest everything including firmwares as of about Jan 20th (checked it very recently)
my read speed, my new network setup, and my radeon clocking down into idle/2D clock rate while gaming and watching a video alt-tabbed are my three main gripes right now
Netgear WNDR4500 router with dual band wifi, 4 ethernet ports and DD-WRT installed on it. It has a fairly powerful CPU for a router (it's about twice as fast as the typical router's CPU from 2010-2011) running on the MIPS architecture. Broadcom chipset.
to this WNDR4500 I've connected my phone over USB, but that's not the end of it
I have a startup script saved in NVRAM on the router that launches Klink and sets up routing, and it copies the Klink binaries from a plugged-in flash drive
@Bob oh. I found a build of the WNDR4500's DD-WRT from some guy on some wiki (I googled around), the build was released December 10, 2012 and it works very well
tested and working, for me: router firmware, USB 2.0 storage (and in my case Android Debug Bridge over USB, lol); WiFi 2.4 GHz with WPA2-Personal/AES (though it drops out with my tablet)
@JourneymanGeek I have no choice! I have client devices that support whatever they support, and it's either throw out my devices (Roku, Nexus 7, Cotton Candy) or get a router that supports them
fortunately, my ThinkPad T530's wifi chipset supports 5 GHz, so maybe that will be more stable, but it'll usually be in a fixed configuration (on my desk) so I should be able to plug it into ethernet.
@Bob uhh... just FYI, SATA -> USB -> router is a bad idea. Router SoCs don't have a very large bus throughput, and you're losing a ton of performance by going from SATA to USB 2.0... at least get a router with USB 3.0 and a decent ARM SoC.
if I were looking to build a small NAS, I'd buy some kind of dual core ARM box (basically phone/tablet hardware), make sure it supports USB 3.0 or native SATA, and put some Linux distro on it
@Bob Oh, okay. That's actually not that terrible. Your Atheros is based on the same MIPS reference design (74k) as my Broadcom MIPS chipset. The performance difference will be as small as between two competing ARM Cortex A15s, for example. The OEM can do minor tweaks, but they're taking the core from MIPS
MIPS 74k is still much, much slower than most modern ARM SoCs designed for smartphones/tablets, but it can push a goodly bit of data over the bus... just, I wouldn't use USB 2.0. If it had some kind of eSATA connector I'd say yes.
too bad you can't connect up your drives over ethernet, but to do that you'd need another "computer" to host the SATA disks and your problem starts over again
because that gigabit ethernet is considerably faster than your USB 2.0 as far as bus speed
I just had those spare after I upgraded my Dell R300 poweredge. (could not order without drives, so I ordered the smallest drives, tossed them out and bough some 15K RPM SAS drives)
on LTE I get between 12 and 25 Mbps on average. I have never received more than 26970 kilobits per second on LTE in any direction, and that was a burst test. it's more than enough to pipe that through USB 2.0.
disk storage needs actual throughput, but I can easily sneak LTE through a low powered MIPS core on USB 2.0 and get all the throughput
I understand that Windows Memory Diagnostics Tool may appear inactive at times, but there has been no progress for more than an hour. Apparently stuck at pass 1 of 2, 26% complete (13% complete overall). Is it normal to find a wait of more than an hour with no progress?
Dang, I got a hold of four 27" screens yesterday and set them all vertical... today I have to ship them out, so I'm back to my one 27" and two 19"s, I feel so cramped
don't know if anyone is into traditional pop (sort of a crossover of classical / vocal music with a blend of pop style), but Andrea Bocelli's new album "Passione" is available on Amazon MP3 and Spotify as of this morning
This is a Canonical Question about RAID levels.
What are:
the RAID levels typically used (including the RAID-Z family)?
deployments are they commonly found in?
benefits and pitfalls of each?
