All the better, although if you are using KDE-4.x.x I would also recommend a KDE-3.5.10 or Gnome live CD, in case there are some desktop aspects impacting this (although given you did not see the drive with fdisk, I doubt this is desktop related). I typically recommend sidux as a good live CD for hardware detection.
Most of my external drives are a mix of Seagate/Maxtors.
Daisy chaining works like a charm with my Seagate and Maxtors with firewire and openSUSE-11.1. In fact, it worked in 11.0, 10.3, 10.2, 10.1, 10.0, and 9.3, albeit we were only talking 2 daisy chained firewire drives with 9.3 as opposed to 5 now. This was all with KDE3. However hot plug automounting has not always worked for NTFS. With the earlier SuSE versions I had to manually mount.
What is interesting there is it suggests the drive is fine (which you pretty much confirmed already by your MS-Windoze successful use) and that it works under a different openSUSE version. In both cases are you running the same desktop ? … and the only important difference that you can think of is (1) different PC hardware and (2) one PC uses 32-bit openSUSE-11.1 and the other 64-bit openSUSE-11.1 ?
I’m not at my Linux PC(s) setup now, so I can’t comment much on speed. And even IF I was at my Linux PC, I don’t know what would make a good speed test for firewire. I do recall my data transfers are very quick, and that the amount of RAM adds a degree of “confusion” to the reported transfer speed. My Intel Core i7 920 w/6GB of RAM is very disceptive, as it appears a massive amount of data is cached during the transfer and so its difficult to determine the actual transfer speed.
I found it intersting that you were successful with so many partitions. During the above test of yours, I noted 3 hard drives with a combined 5 primary partitions, 3 extended partitions, and 10 logical partitions for a total of 18 partitions (of which 15 directly contain files). I’m puzzling how the libata limitation of 15 partitions applies here. … Is the libata 15 partition limitation drive specific only ? or is it Linux operating system specific ? … and does it only apply to logical and primary partitions ? or does it include extended partitions when one is counting to see how many partitions relevant to libata’s limitation one has in one’s system ?
I did wonder about your previous comment on number of partitions.
I’ve been in the habit of using a lot of partitions ever since I actually had a hard-drive, circa 1983. It was a 10MB SCSI Maxtor. I still have it somewhere. I can remember running at least 20 partitions on OS/2 when it first came out, and even on a Windoze machine that was all my employer would allow me to use. :’(
I find it a good way to separate different sets of data and software, and easier to handle than folders alone. It’s a state of mind, I guess. I’ve a feeling that it might have given slightly better performance then as well, on the hard-drive technology of the time, but I don’t know for sure. I hear the opposite is true now, if anything, but again I have no proof.
So I was amazed when you came up with such a low limit for the number of partitions usable on Linux. How does that work for networked drives? I’d’ve thought that Linux could handle a lot more, in fact, not being limited by alphabetical partition/drive identifiers (like C: ) in Windows. Interesting.
Yes – both machines have KDE, and they’re running different SUSE versions, 32-bit and 64-bit, both 11.1.
I haven’t officially reported this as a bug because I’ve been unable to reliably replicate the problem. It seems to be a moving target. If nobody reports something similar I guess I’ll blame dæmonic intervention. Again.
Transfer Speed Department: Using the command su -c 'hdparm -t /dev/sdx**’** I notice that Firewire performance is not all that much better than USB on the two machines I’ve tried it on (with the same external HDD). This is vanilla Firewire 400 and USB 2.0, averages of four runs.
Machine 1: USB 27 MB/s; Firewire 30 MB/s
Machine 2: USB 20 MB/s; Firewire 23 MB/s
I know it’s a crude test, but surely indicative of something?
I’m waiting until Firewire 800 cards get a bit cheaper before I invest. Is it really twice as fast?
[One of the machines has USB1 as well. That delivers less than 1MB/s for the same test.]