That's a nice chart but your "real world" results suffer from the same problems you mention in the footnote on usb, especially the sata and gig-e
"Their testing also revealed that the first generation of the PowerMac G5 delivered poor I/O across the board, scoring lower than even the mobile PowerBook and low cost eMac in both Firewire and USB. That indicates that the theoretical expectations for USB (or any protocol) are nearly meaningless when compared to the actual speed of the disk, processor, the implementation of the protocol itself, and other factors that might cause interference or otherwise eat up the expected maximum throughput speeds. In other words, USB does not ever run at its maximum theoretical speed rating."
I just did some testing. The transmission speed for copying files onto the TC wirelessly is not great but okay for a usual incremental backup. In theory. I just copied a folder with a couple of movie files totalling 114.5 MB in 87 seconds which translates to 1.31 MB/sec.
However, when Time Machine is doing an incremental backup, I get nowhere near those transmission speeds. First it takes ages for the backup to commence, sometimes more than 20 minutes while it just says "preparing backup". And the transmission rates during the backup are simply terrible. Somtimes a 1.5 MB incremental backup takes more than an hour!
So for some reason there seems to be a huge difference between copying files manually to the TC and doing so via the automatic TM backup.
Does anybody have an idea as to why that is?
BTW, I have a 12" G4 PB, which of course doesn't use the n-standard. Signal strength is excellent though.
PS: I manually started an incremental backup before writing this post. It still says "preparing backup" - since more than seven minutes now. Something is clearly wrong here...
There is a big difference between 802.11n and 802.11g. I'd think that Time Capsule would work perfectly with an only 802.11n network. This is why I can stream 1080p video wireless to my MacBook Pro via a connected 500GB hard drive.
Whimsical, keep in mind that when you add something that's not 802.11n to the network that it slows down the whole network. That's why I bought a Airport Express and Airport Extreme. I keep my Airport Extreme on 5 GHZ 802.11n only and Airport Extreme for 2.4 GHZ 802.11 b/g. They do not interfere with each other and I can optimum transfer rates. Just an FYI, sorry that you aren't having a good experience with Time Capsule.
Comments
"Their testing also revealed that the first generation of the PowerMac G5 delivered poor I/O across the board, scoring lower than even the mobile PowerBook and low cost eMac in both Firewire and USB. That indicates that the theoretical expectations for USB (or any protocol) are nearly meaningless when compared to the actual speed of the disk, processor, the implementation of the protocol itself, and other factors that might cause interference or otherwise eat up the expected maximum throughput speeds. In other words, USB does not ever run at its maximum theoretical speed rating."
I just did some testing. The transmission speed for copying files onto the TC wirelessly is not great but okay for a usual incremental backup. In theory. I just copied a folder with a couple of movie files totalling 114.5 MB in 87 seconds which translates to 1.31 MB/sec.
However, when Time Machine is doing an incremental backup, I get nowhere near those transmission speeds. First it takes ages for the backup to commence, sometimes more than 20 minutes while it just says "preparing backup". And the transmission rates during the backup are simply terrible. Somtimes a 1.5 MB incremental backup takes more than an hour!
So for some reason there seems to be a huge difference between copying files manually to the TC and doing so via the automatic TM backup.
Does anybody have an idea as to why that is?
BTW, I have a 12" G4 PB, which of course doesn't use the n-standard. Signal strength is excellent though.
PS: I manually started an incremental backup before writing this post. It still says "preparing backup" - since more than seven minutes now. Something is clearly wrong here...
There is a big difference between 802.11n and 802.11g. I'd think that Time Capsule would work perfectly with an only 802.11n network. This is why I can stream 1080p video wireless to my MacBook Pro via a connected 500GB hard drive.
Whimsical, keep in mind that when you add something that's not 802.11n to the network that it slows down the whole network. That's why I bought a Airport Express and Airport Extreme. I keep my Airport Extreme on 5 GHZ 802.11n only and Airport Extreme for 2.4 GHZ 802.11 b/g. They do not interfere with each other and I can optimum transfer rates. Just an FYI, sorry that you aren't having a good experience with Time Capsule.