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Have you ever looked at solid state drives? Or the Seagate Momentus XT which is a 4gb SSD/500GB hybrid? Or why ReadyBoost works? It is because of the reduced seek time.
Originally Posted by MY2NADS
The PS3 doesnt have the system memory to load much of the game into ram so in order to reduce load times it "caches/installs" it to the hard drive. While playing from the bluray or hard drive data is transferred using DMA so the CPU is probably not even involved. Using a network attached storage device would mean significant overhead as each request is pushed through some SMB/CIFS driver (for example) then through the TCPIP driver out over the network where the NAS device has to find which blocks refer to the files, wrap it up in samba and tcp and send it back for the ps3 to unwrap the tcp/ip and then pass to the SMB driver then present it to the cpu to be copied into memory. There is also a very good chance your SOHO GB switch has a maximum backbone of something far less than 1GBps. This may be simplified but it might help you understand how many extra steps there are. Some of this could be helped if an NFS driver was native to the system but I doubt Sony will ever do that.
Raw throughput goes hand in hand with low seek times to get high speed data transfer. Otherwise running every game straight from the bluray wouldn't be an issue (try that with gt5 and youll rip your hair out). This is why using the same hard drive internal to the PS3 is much faster than external. Just the overhead from fat32 and the USB interface is killing what is possible through sata/dma.
Most USB2.0 chipsets max out at 50MBps which happens to be ~ the same as the 50MBps average maximum sustained throughput of good 5400 2.5 inch drives (most 7200 rpm drives 60-100MBps).
Id like to know if you gotten more than 30MBps over GIG-E while transfering data to the PS3. Using a cross over cable doesnt count
Last edited by braschlosan; 12-10-2010 at 09:59 AM.
Strange, my USB2.0 hard drives don't even get 50MB even at peak usually around 20MB peak and 16MB avg. My PC only has USB 2.0 ports and made sure in the bios that it's using full speed.
Originally Posted by braschlosan
However my Gigabit network copies everything extremely fast for me and at peak I get 60MB and average around 45MB transferring from PC to PC or PC to my NAS (I don't know about PS3 to my NAS as there's no way I can check besides copying media files to the PS3 but it has no accurate way to check avg/peak).
Now since my PS3 HDD is a 7200RPM but still under SATA 150 since that's what the PS3 is pretty much sits at. I peak sending files around 45MB and average around 35MB. Getting files from the PS3 at peak is 52MB and averages around 40MB.
For me however network transfer is much faster than my USB 2.0 HDD.
Solid State HDD is a waste and doesn't improve that much on a PS3.
So your point on the resources I didn't really think about it so it does hold weight, more so why I can play my games that I've installed from my PC to the NAS since the PC has more power to compensate.
But from personal experience playing games from SMB mounting on the PS2 pretty much play flawlessly once my NAS hard drive spins up especially with the new version of Open PS2 Loader minus the compatibility issue aside (and that's a 5400RPM hard drive BTW. I guess since my NAS is Linux based I don't have to worry about defragging the HDD). So from my perspective I think it'll run just fine if SMB mounting is available on the PS3 using a gigabit network.
What are you using for your switch? I am curious how you got such high sending speeds to the ps3.
AFAIK the PS3 drive should max out at 9MBps while the PS2 should max at 5MBps so NAS might be able to be faster than straight bluray even with the overhead... I didnt realize the drives were so fracking slow. I'm used to setting up DB servers and every little millisecond of overhead can add up to lost productivity
The output on a PS3 HDD isn't true, it can go a lot faster than that. If a netbook can output high transfer speed so the PS3 should be at least a bit slower.
Originally Posted by braschlosan
The reason the BR drive seems slow is because the data is scattered everywhere. The BR drive is actually reads faster than the 360 dvd drive at max but sustaining that read speed is totally different matter. I think even wiki even states that it can read faster than a DVD drive.
The transfer on the PS3 is slow over network for me if there's lot of small files but lets say anything bigger than 12MB file it goes fast like I stated. Only a few PS3 games that I own goes slow for copying.
I have a Netgear Gigabit router (WDNR37000) and a Netgear Gigabit 5 port switch I don't know what model it is and I know some version doesn't do jumbo frame but mine does. The WDNR37000 doesn't say it does but unofficially it does as I have checked myself.
I don't know if the PS3 has Jumbo frame but even if it doesn't it wouldn't degrade the network speed as it'll just go to default that it's allowed.
There's many variable to why I'm getting so high speed rate on my PS3 but it could be because my PS3 HDD is 7200 RPM and have 16MB cache, along with my network.
Also my NAS is raided (it usually gives me a boost approx 5-8MB more in network speed, thinking about not raiding as 5-8MB in speed isn't that big of a difference for me).
Not all NAS is made equal sorry to say since I've gone through several NAS until I kept my QNAP series.
Last edited by MY2NADS; 12-10-2010 at 11:09 AM.
My 9MBps and 5MBps are about the optical drives.
Sorry I haven't slept yet .
Originally Posted by braschlosan
No the PS3 BR drive can read faster than that, faster than x12 DVD rom drive anyways for a x2 BR drive that the PS3 has. I do know that the BR files are scattered everywhere though.
Anyways, I just checked the ftp using Multiman 1.10.17 (just updated) and I just updated Filezilla (220.127.116.11) and now it seems slower. I guess I might be wrong as it might have been a bug with Filezilla and or game managers that has FTP. However my PC-PC or PC-NAS is the same even after I updated.
Used US Vanquish file data001 (9,456,489,168 bytes/8.80GB) as a test. I'm not going to bother downgrading the Filezilla (forgot what version I had anyways) and Multimanager (forgot what version I used when I had high speed or did I use Rogero-Manager back then?) and no I didn't use the data001 as a test last time, I just guesstimated in the past since it was faster for me to transfer the files back to the PS3 instead of re-ripping the game back on to the PS3 directly. Anyways I'll humor you what the results are (I'm testing as I'm typing and waiting).
Used Multiman 1.10.17 FTP
Filezilla log "File transfer successful, transferred 9,456,489,168 bytes in 590 seconds" PC to PS3
Filezilla log "File transfer successful, transferred 9,456,489,168 bytes in 297 seconds" PS3 to PC
Used Blackbox FTP 1.2 FTP
Filezilla log "File transfer successful, transferred 9,456,489,168 bytes in 352 seconds" PC to PS3
Filezilla log "File transfer successful, transferred 9,456,489,168 bytes in 248 seconds" PS3 to PC
Usually I don't use Filezilla or use Multiman (I usually use Blackbox) as my FTP but my other FTP I use to use (that I uninstalled) was a trial version and it kept logs on the network speed transfer.
I hate using FZ on the PS3 some files shows over 100% transferred on the bar and sometimes it freezes on connection. Anyways regardless I think my first statement on the peak and avg was bit off. Still I just transferred over one of my games to the PS3 and it took about 30 seconds longer than usual... must be the FTP program.
Last edited by MY2NADS; 12-10-2010 at 11:28 AM.
According to the specifications I read the PS3 has a 2XBluRay drive and the PS2 has a 4xDVD which are 72 Mbit/s and 44mbit/s respectively.
If I calculated it right your blackbox transfers were between 26-37MBps? Averaging those two gets you 31.5MBps, hehe didn't I say it was hard to get more than 30
Even at 30 that is still much faster than the BD can do so loading over the network could actually be a viable option, especially if you let the game "install" some of its file on the local hard drive (the NAS would be pretending to be the BluRay drive in this case)