[OpenIndiana-discuss] Seagate 3000GB Drive only shows 746GB

Jaco Schoonen jaco at macuser.nl
Sun Sep 30 20:16:00 UTC 2012

Hi Roel,

> If i remember well this 2k sector problem has been discussed last week on this mailinglist. 
> I am very interested in how do use these drives since i want to buy some as well.

After my struggles of last week to get the pool to be created with ashift=12 I just finished the migration of my data.

I had about 2,6 TB of data which was on a raid-z of 3 X 1,5TB Samsung HD154UI drives (with a small OCZ SSD as log + cache).

During migration I had the 3 x 3TB Seagate ST3000DM001 connected to an ATA, and an 2 USB/esata-dockingstations (cheap 20 euro Sweex-unit, but handled the big disks just fine). OI handled the different interfaces/speeds (caused by the limited space in my HP N36L) complete transparently.

Now I have them connected again to the internal SATA-ports. The Seagates behave very well. To give you an idea of performance, some scrub-statistics:

Orignal with 3 x samsung HD154UI : 
  scan: scrub repaired 0 in 22h7m with 0 errors on Mon Sep 24 22:43:37 2012

Seagates connected to weird combination of ata/usb/esata:
scan: scrub repaired 0 in 16h26m with 0 errors on Fri Sep 28 23:42:23 2012

Now back at SATA-speed:
  scan: scrub repaired 0 in 3h39m with 0 errors on Sun Sep 30 15:05:51 2012

Best regards,


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