WD10EADS strange bahaviour

[laptokowiec]

Hi
I've got one of those (NTFS fmt, 2 partitions)
When scanning in MHDD or cloning (ddrescue) it runs at 100-60 MB/s.
While opened in Win or Ubuntu becomes very very slow - avg.transfer 18MB/s (copying big files - 600-1500 MB), seek time - infinity (opening partition takes 20-30 sec).
Any ideas ?

[lcoughey]

When you are transferring at slow speed, how is the drive connected to the system and to what are you transferring to? How are you copying 1.5TB files from a 1TB drive?

File system transfers will always be slower than sector level transfers. If you have a lot of files on the drive, the MFT table could be large and take longer to load, as well.

[mr_spokk]

@ lcoughey: I think it is 1.5Gb
@ laptokowiec: could be a firmware issue.

[laptokowiec]

When you are transferring at slow speed, how is the drive connected to the system and to what are you transferring to? How are you copying 1.5TB files from a 1TB drive?

File system transfers will always be slower than sector level transfers. If you have a lot of files on the drive, the MFT table could be large and take longer to load, as well.

It's 1,5GB like mr_spokk noticed.
It's connected through sata.

While copying it looks like it transfers some amount of data then stops/waits (for a few seconds) and again transfers next portion

[labtech]

I would suspect firmware issue as well

[laptokowiec]

Have they (WD) released any firmware upgrade like Seagate for .11 ?

[BlackST]

Hi
I've got one of those (NTFS fmt, 2 partitions)
When scanning in MHDD or cloning (ddrescue) it runs at 100-60 MB/s.
While opened in Win or Ubuntu becomes very very slow - avg.transfer 18MB/s (copying big files - 600-1500 MB), seek time - infinity (opening partition takes 20-30 sec).
Any ideas ?

Firmware, heads or logic board failure. Or a blended problem.

I would check each separately and also on different environment.

P.S. NTFS/MFT is not the culprit as the same problem comes out while scanning with MHDD tht is FS independent !