The current issue with the Seagate 7200.11 drives is related to the version of the firmware that is in the drive, not to RAID. Also affected by this issue are some Maxtor drives and some Seagate ES.2 (enterprise) drives.
If you have one of the affected drives and the firmware has been upgraded then you should be good to go. That said if I owned one of the drives I'd upgrade the firmware now and also come back in a month and check if another new firware version was offered. If so upgrade the firmware again. The first firmware fix had big problems, but so far the second fix version looks like it's good.
IF YOU HAVE THE OLD FIRMWARE then each time one of those drives is powered on there is a one in 50,000 shot that the drive will nuke itself. All the data is still there on the drive and can be gotten back by flashing the firmware. Without the firmware flash the dead drives simply will not respond to a drive controller. They are bricked (temporarily). See the link below.
I have problems reading Slashdot unless I use the Firefox browser ...
http://it.slashdot.org/comments.pl?sid=1098793&cid=26542735
Below is a link to the list of the affected drives.
http://seagate.custkb.com/seagate/crm/selfservice/news.jsp?DocId=207931
To find out what your firmware level is you can install and run the tool on the web page below.
http://seatools.seagate.com/
I believe that there is another program also offered by Seagate that will tell you the firmware level, but I can't remember the name of it.
The most troubling thing about the recent Seagate 7200.11 firmware debacle was that the mods in their support forum (forums.seagate.com) were deleting and altering the users posts and even blocking links in private messages to a posting on another board which could help the victims. That sort of behavior REALLY gives the company a black eye ... in spite of the effort on the engineering side to ship only the most reliable of products.
Eventually ALL disk drive companies have a fiasco where they find that they have shipped a lot of bad product or very similarly a lot of product has gotten out that needs a difficult field upgrade. For example: IBM/Hitachi Deathstar, Quantum Bigfoot, etc, etc.
The question is how do you deal with that situation after it has happened.
BTW - It is perfectly normal at Seagate for them to ask you to send them an email containing your particulars (disk model, serial number, firmware level, etc) before they will respond with links/instructions/etc. and "allow" you to upgrade your own firmware. That's how they've always done it in the past. They see that as an effort to protect their customers from blasting themselves in the foot. I believe that this time, for many but not all customers, there are direct links on the Seagate website that customers can use to simply download the new firmware. It's difficult to go the email route when 14 million drives have been shipped that need to be upgraded.
The thing here is that you do NOT want to have to go through a firmware flash if you can at all avoid it. Flashing new drives to the proper firmware level "should be on them" (the folks at the factory). Any time a mobo or disk is flashed there is a chance that it will be done slightly incorrectly or some electrical glitch could happen and then the mobo/disk/etc is bricked in a really nasty way and you're going to have to pay a lot of money to get it unbricked.
Pretty much all drives in the channel (if on the "list of the affected drives" link above) at this point will need the firmware upgrade.
I recommend only buying one of those drives if you can be sure that the firmware is already at the correct level ... and then check the firmware level of the drive once you've installed it.
One other point ... only Seagate drives that are directly connected to a SATA controller can have their firmware examined or flashed. If your drive is in a USB or Firewire external enclosure then no dice. That probably does not apply to eSATA hookups, but I'm not sure.