On 04/30/2010 10:13 AM, Thomas Bächler wrote:
Am 30.04.2010 01:37, schrieb bardo:
Parted automatically warned me about an unoptimal sector alignment when I tried to put the first partition at 0 (the first partition should start at 2MB), but if you want to be extra-sure just check the the '-a optimal' parameter. About the disk reliability I can't tell much, but I already transferred some 100GB to it, and of course I had the first RAID5 build, which took a few hours and ran through the whole disk. Also, smartctl doesn't have anything bad to say.
I'm still curious about the status of 4k support in the latest util-linux-ng's (c)fdisk. Did anyone try that?
From my tests not too long ago cfdisk does not play well with the current 4K sector disks, at least when they report a 512B sector size as is the case with the WD EADS disks. It also seems (to me) that cfdisk will not play well with partition schemes that are not created in "compatibility" mode so unless it gets updated it will soon be a nonstarter for disk partitioning.
fdisk will align all partitions if you start it with 'fdisk -uc' and accept the suggested partition start and use +***M to specify the size of partitions, I didn't try specifying the end in sectors and check what it would do to the next partition though. I have tried this with an external WD Elements disk and fdisk. If using the whole disk with one partition, fdisk will set exactly the same start and end sectors that WD uses in the partition they define and format in the factory. I did not try parted but I've read that it will also align the partitions properly, but it may require some extra switch to disable the alignment to cylinders. -- Mauro Santos