a quick search on OWC and I found this:
http://eshop.macsales.com/item/Sonnet Technology/TSATAIIE2P/
I've been using the E2P and never had a kernal panic. I'm on a 2008 Mac Pro, though.I purchased the Sonnet Tempo E2P (same as linked above by bigbomb) from OWC. It causes kernel panics all day long.
I was worried because I installed it along with my flashed 4870 and thought it was the 4870. Nope, did some reading and the E2P is known to cause kernel panics. I took it out and haven't had a problem since.
Apparently, Sonnet has listed on their website that it is not currently compatible with the new Mac Pros. Lame.
Do you even need a card? What's this (see attachments)? It seems to me there are already two extra ports. No?
It's a port extender to use the two unused SATA ports on the motherboards of pre-2009 Mac Pros. The problem is the ports won't be hot-swappable like true eSATA. Unplugging your external drive while the machine's running would be like pulling out an internal hard drive -- very bad.
Oh. 🙁 But can't we use the Eject menu item? 🙂
Yes, but you cannot physically disconnect your external drive from the port.
An important difference between eSATA and the other guys
One thing I should point out to those unfamiliar with eSATA is an eSATA connection is not hot-swappable like USB and FireWire connections. In order to be recognized, you must have the hard drive powered on and connected via eSATA before you boot your Mac (like the SCSI connections of old). Youll notice when connected via eSATA, our Quad drive does not display the eject icon in the Finder that it does when connected via USB or FireWire. You actually CAN eject it by unmounting it in the Disk Utility app, and then reconnect via USB or FireWire if you choose to.
So it sounds like you can't just unplug an external drive from an eSATA PCIe card either then? So what's the difference from using the mobo SATA ports then? Except apart from a PCI card looking easier to install than removing the fan assembly - the photo of the ports with just a cable makes it looks deceptively simple, but after looking at that article, just sticking a card in looks a lot simpler.
I'm not sure if it could be damaging to flip the power switch on an external drive when using the port extender.I was looking at this option myself. So what you're saying is you can't even switch the external drive off unless the Mac is shut down first? Even if you eject the drive first?
A true eSATA card like the E2P supports hot-swapping.
The Sonnet E4P will give you hot swap
Maybe I set mine to be ejectable this way in one of those multi-tweak utilities and just forgot. I forget, 😉 but either way all my SATA units either have an icon or a RMB click on the DT Drive icon image reveals an "Eject ..." option.
Anyway if eSATA isn't remountable/ejectable then WTH is this:
~
There's the exact cable I imaged (in post #10) on the Japanese e-bay right now for $4.50. I'm going to get it and one of these HDD cradles and try it and then report back here in a week or so.
None of my internal SATA drives have the eject icon like external firewire or USB drive images do. But you're right that it's available anyway as a right mouse click. So what happens when you eject an internal SATA drive? Does it stay offline until the next reboot?
Mac Help said:Ejecting a disk or volume
After working with a disk, server volume, iPod, CD or DVD, or FireWire drive, you may want to eject it to remove it from your desktop.
Before you eject an item, close any open documents on it and quit any applications that may be using files on the disk.
To eject a disk or volume, do one of the following:
■Select the item to eject, and choose File > Eject.
■In the sidebar of a Finder window, click the Eject button next to the item’s name.
■Drag the item to the Trash icon in the Dock. (While you drag, the Trash icon changes to an Eject icon.)
■To eject a CD or DVD, hold down the Media Eject key until the Eject icon appears on your screen.
If your keyboard doesn’t have a Media Eject key, hold down the F12 key until the Eject icon appears on your screen.
If your computer has two optical drives, hold down Option-Media Eject or Option-F12 to eject a disc from the second drive.
■Click the Eject icon in your menu bar, if there is one.
■Hold down the mouse button when you start up your computer.
If a disk contains more than one volume, you can eject all its volumes or just one:
■To eject all volumes, hold down the Option key as you eject one of the disk’s volumes.
■To eject just one volume, hold down the Control key as you eject that volume.
If you eject one of the volumes without holding down a modifier key, a dialog appears asking whether to eject all the volumes or just one.
Mac Help said:If you ejected a volume that you still need
If you eject a volume (or disk partition) located on an external hard disk, unplug the disk and plug it back in to make the volume available.
You can also use Disk Utility, in the Utilities folder of the Applications folder, to “mount” the volume again and make it available on your desktop or in the Finder. To learn more about mounting volumes using Disk Utility, open Disk Utility, and refer to Disk Utility Help.
But I have to say that eSATA's a flaky port. Not as solidly reliable as firewire, in my experience.