Re: Looking advice for buy hard disks

[Camaleón]

On Thu, 27 Jan 2011 09:34:49 +0100, Alfonso Ruiz wrote:

 I would like ask here for advice about HDs for Linux, because I use
 Squeeze and don´t want have the same problems that people that bought
 WD20EARS disks.
 
 I plan buy one ST32000641AS for my desktop/server and one ST2000DL003
 for use for backups purpose via an external esata box.
 
 The ST2000DL003 is 4096 bytes per sector, can this have problems with
 squeeze?

I don't think why. Most of the tera-large hard disks are now using that 
4K alignment. Though the answer will vary if you are planning to share 
the disk between old OSes that can have problems with the new aligment or 
a raid based setup.

 The ST32000641AS is sata3, but will be connected to an sata2
 motherboard, so, can have any problem for this in Squeeze?

Sata600 should be fully compatible with sata300, just it will auto-slow 
to the available speed the same it happens right now with sata300 disks 
and sata150 ports.

One side note on Seagate hard disks. If you are planning to use both 
disks in a server environment, you should look at their enterprise 
products as they tend to have higher MTBF values and are labeled as 
ready for 24x7 usage. 

OTOH, I was told in many times that beyond the 500 GiB. barrier you can 
see many of these non enterprise sata disks diying very quickly because 
they are not very well suited/prepared for intensive tasks and it is 
better going with sas or scsi devices.
 
Greetings,

-- 
Camaleón


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Looking advice for buy hard disks

[Alfonso Ruiz]

Hello.

I would like ask here for advice about HDs for Linux, because I use Squeeze
and don´t want have the same problems that people that bought WD20EARS
disks.

I plan buy one ST32000641AS for my desktop/server and one ST2000DL003 for
use for backups purpose via an external esata box.

The ST2000DL003 is 4096 bytes per sector, can this have problems with
squeeze?

The ST32000641AS is sata3, but will be connected to an sata2 motherboard,
so, can have any problem for this in Squeeze?

Mainly I choose these disks because are available at my local store

Thanks for the advices.

Below there is all disk specifications




Specifications 2 TB1
Model Number ST32000641AS
Interface Options SATA 6Gb/s NCQ
Performance
Transfer Rate, Max Ext (MB/s) 600
Sustained Data Rate OD (MB/s) 138
Cache (MB) 64
Average Latency (ms) 4.16
Spindle Speed (RPM) 7200
Configuration/Organization
Heads/Disks 8/4
Bytes per Sector 512
Reliability/Data Integrity
Load/Unload Cycles 300K
Nonrecoverable Read Errors per Bits Read, Max 1 per 10E14
Annualized Failure Rate 0.34%
Mean Time Between Failures (hours) 750,000
Limited Warranty (years) 5
Power Management
Startup Current +12 Peak(A, ±10%) 2.8
Seek, Average (W) 7.3
Operating, Average (W) 9.23
Idle, Average (W) 6.39
Environmental
Temperature (°C)
Operating
Nonoperating
5 to 60
–40 to 70
Shock (Gs)
Operating: 2 ms
Nonoperating: 2 ms
63
300
Acoustics (bels – sound power)
Idle
Seek
2.8
3.2
Physical
Height (in/mm) 1.028/26.1
Width (in/mm) 4.00/101.6
Depth (in/mm) 5.787/146.99





Drive specification ST2000DL003
Formatted capacity (4096 bytes/sector)*
2000GB
Guaranteed sectors 3,907,029,168
Heads 6
Disks 3
Bytes per sector 4096
Default sectors per track 63
Default read/write heads 16
Default cylinders 16,383
Recording density (max) 1632kb/in
Track density (avg) 274ktracks/in
Areal density (avg) 422Gb/in2
Spindle speed 5900 RPM
Internal data transfer rate (max) 1928Mb/s
Sustained data transfer rate OD 144MB/s
I/O data-transfer rate 600MB/s
ATA data-transfer modes supported
PIO modes: 0 to 4
Multiword DMA modes: 0 to 2
Ultra DMA modes: 0 to 6
Cache buffer 64MB
Height (max) 26.1mm / 1.028 in
Width (max) 101.6mm / 4.0 in
(± 0.010 in)