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On Mon, Mar 16, 2015 at 3:12 PM, Linda Walsh
Chris Murphy wrote:
On Mon, Mar 16, 2015 at 11:49 AM, Felix Miata
wrote: IOW, Anton was on track, everything made in the past 4+ years is 4k.
HGST lists the Ultrastar 7K4000's as a 2013 product. They come in 512n versions up to 4TB.
---- The 512n = it is compatible with 512-byte OS's, because the *disk* firmware does the buffering transparently for drivers and controllers that don't know about it's 4k sector size.
512n = 512new-format.
No. The n means native. The spec sheet I included specifically distinguishes between these drives at a physical level, their areal densities are different, it's not just a matter of a different kind of abstraction.
I have multiples of this... and my old RAID controller, an LSI8080-8e would only read them as 512 byte sectors -- even though the linux kernel would show them their physical size as 4096 bytes: My 'sda' is a raid of these': showing pwd cuz my prompt is trimmed to show only 1st and last parts of long paths:
Ishtar:/sys/devices/pci0000:00/../sda/queue> pwd /sys/devices/pci0000:00/0000:00:09.0/0000:07:00.0/host0/target0:2:0/0:2:0:0/block/sda/queue Ishtar:/sys/devices/pci0000:00/../sda/queue> cat logical_block_size 512 Ishtar:/sys/devices/pci0000:00/../sda/queue> cat physical_block_size 4096 Ishtar:/sys/devices/pci0000:00/../sda/queue>
This is clearly a 512e drive, not 512n. -- Chris Murphy -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org