differenze tra hd

[_mr_]

Scusate vorrei sapere la differenza tra un paio di hd
1) la differenza tra seagate Barracuda ES (http://www.seagate.com/products/enterprise/barracuda_es.html) e Barracuda 7200.10 (http://www.seagate.com/products/personal/barracuda.html)

2) la differenza tra Western digital Caviar SE1 500 GB (WD5000KS (http://www.westerndigital.com/en/products/Products.asp?DriveID=214)) e RE2 500 GB (WD5000YS (http://www.westerndigital.com/en/products/Products.asp?DriveID=238))

quale mi consigliate tra questi quattro (io pensavo al barracuda, ma prima vorrei avere chiara la differenza tra i due barracuda)

[MM]

Le differenze consistono essenzialmente nel tipo di utilizzo a cui sono destinati (basta leggere nelle specifiche dei produttori)
In pratica, semplificando: una serie è improntata ad un uso "casalingo" con prestazioni migliori, l'altra per un uso "enterprise", sempre accesi e con grossi carichi di lavoro (maggiore affidabilità nel tempo)

[_mr_]

sinceramente tra la carattaristiche tecniche dei due WD io non ho notato grandi differenze, mentre per quanto riguarda i barracuda, non ho ancora fatto un confronto
queste sono quelle del caviar

Performance Specifications
Rotational Speed 7,200 RPM (nominal)
Buffer Size 16 MB
Average Latency 4.20 ms (nominal)
Contact Start/Stop Cycles 50,000 minimum
Seek Times
Read Seek Time 8.9 ms
Write Seek Time 10.9 ms (average)
Track-To-Track Seek Time 2.0 ms (average)
Full Stroke Seek 21.0 ms (average)
Transfer Rates
Buffer To Host (Serial ATA) 300 MB/s (Max)
Buffer To Disk 748 Mbits/s (Max)
Physical Specifications
Formatted Capacity 500,107 MB
Capacity 500 GB
Interface SATA 300 MB/s
User Sectors Per Drive 976,773,168
Physical Dimensions
Height 26.1 mm (Max)
Length 147 mm (Max)
Width 101.6 mm
Weight 0.6 kg
Environmental Specifications
Shock
Operating Shock (Read) 65G, 2 ms
Non-operating Shock 250G, 2 ms
Acoustics
Idle Mode 28 dBA (average)
Seek Mode 0 33 dBA (average)
Seek Mode 3 29 dBA (average)
Temperature
Operating 5° C to 55° C
Non-operating -40° C to 65° C
Humidity
Operating 5-95% RH non-condensing
Non-operating 5-95% RH non-condensing
Altitude
Operating -305M to 3,050M
Non-operating -305M to 12,200M
Vibration
Operating
Linear 20-300 Hz, .75G (0 to peak)
Random 10-300 Hz, 0.004 g² / Hz
Non-operating
Low Frequency 5-20 Hz, 0.195 inches (double amplitude)
High Frequency 20-500 Hz, 4.0G (0 to peak)
Electrical Specifications
Current Requirements
12 VDC
Read/Write 450 mA
Idle 430 mA
Standby 20 mA
Sleep 20 mA
5 VDC
Read/Write 800 mA
Idle 730 mA
Standby 270 mA
Sleep 250 mA
Power Dissipation
Read/Write 9.50 Watts
Idle 8.75 Watts
Standby 1.60 Watts
Sleep 1.50 Watts

e queste del RE2

Performance Specifications
Rotational Speed 7,200 RPM (nominal)
Buffer Size 16 MB
Average Latency 4.20 ms (nominal)
Contact Start/Stop Cycles 50,000 minimum
Seek Times
Read Seek Time 8.7 ms
Track-To-Track Seek Time 0.6 ms (average)
Full Stroke Seek 21.0 ms (average)
Transfer Rates
Buffer To Host (Serial ATA) 3.0 Gb/s (Max)
Buffer To Disk 70 MB/s (Sustained)
Physical Specifications
Formatted Capacity 500,107 MB
Capacity 500 GB
Interface SATA 300 MB/s
User Sectors Per Drive 976,773,168
Physical Dimensions
Height 26.1 mm (Max)
Length 147 mm (Max)
Width 101.6 mm
Weight 0.6 kg
Environmental Specifications
Shock
Operating Shock (Read) 65G, 2 ms
Non-operating Shock 250G, 1 ms
Acoustics
Idle Mode 28 dBA (average)
Seek Mode 0 33 dBA (average)
Temperature
Operating 5° C to 60° C
Non-operating -40° C to 70° C
Humidity
Operating 5-95% RH non-condensing
Non-operating 5-95% RH non-condensing
Altitude
Operating -305M to 3,050M
Non-operating -305M to 12,200M
Vibration
Operating
Linear 20-300 Hz, 0.75G (0 to peak)
Random 0.004 g²/Hz (10 to 300 Hz)
Non-operating
Low Frequency 5-20 Hz, 0.195 inches (double amplitude)
High Frequency 20-500 Hz, 4.0G (0 to peak)
Electrical Specifications
Current Requirements
12 VDC
Read/Write 550 mA
Idle 450 mA
Standby 16 mA
Sleep 16 mA
5 VDC
Read/Write 850 mA
Idle 690 mA
Standby 370 mA
Sleep 360 mA
Power Dissipation
Read/Write 10.75 Watts
Idle 8.90 Watts
Standby 2.00 Watts
Sleep 2.00 Watts

Vedete, sono pressochè identici, se non leggermente nei consumi e penso nei tempi indicati al punto "shock"

queste invece quelle del barracuda 7200.10

Specifications : 500 GB1
Model Number : ST3500630AS
Interface Options : SATA 3Gb/s NCQ

Transfer Rate, Max Ext (Mbytes/sec) : 100/300
Cache (Mbytes) : 16
Average Latency (msec) : 4.16
Spindle Speed (RPM) : 7200

Heads/discs2 : 6/3
Bytes per Sector : 512

Contact Start-Stops : 50.000
Nonrecoverable Read Errors per Bits Read : 1 per 10^14
Annualized Failure Rate (AFR) (%) : 0.34
Limited Warranty (years) : 5
Power Management
+12 VDC +/–10% (amps peak) : 2.08
Power Management (watts)
Seek Avg : 12.06
Operating Avg : 13.00
Idle Avg : 9.03
Environmental
Temperature, Operating (°C) : 0 to 60
Temperature, Nonoperating (°C) : –40 to 70
Shock, Operating: 2 msec (Gs) : 68
Shock, Nonoperating: 1 msec (Gs) : 300
Acoustics, Idle (bels—sound power) : 2.07
Acoustics, Seek (bels—sound power) : 3.00
Physical
Height (in/mm) : 1.028/26.1
Width (in/mm) : 4.000/101.6
Depth (in/mm) : 5.787/146.99
W : 1.59/720


confrontate con quelle del barracuda ES

Specifications : 500GB1
Interface Options : SATA
Model Number : ST3500630NS
External Transfer Rate (Gbits/sec) : 3.00
Performance
Transfer Rate
Maximum Internal (Mbits/sec) : 1030
Maximum Sustained (Mbytes/sec): 72
Cache: Multisegmented (Mbytes) : 16
Average Latency (msec) : 4.16
Spindle Speed (RPM) : 7200
Seek Time
Average Read/Write (msec) : 8.5/9.5
Track-to-Track Read/Write (msec) : 0.8/1.0
Configuration/Organization
Bytes per Sector : 512
Reliability/Data Integrity
Reliability Rating at Full 24x7 Operation (AFR) : 0.73%
Nonrecoverable Read Errors per Bits Read : 1 sector per 10^14
Error Control/Correction (ECC) : 10 bit
Interface Ports : Single
Limited Warranty (years) : 5
Power Management
Typical (watts) : 13.00
Idle Average (watts) : 9.03
Environmental
Temperature Operating (°C) : 5 to 55
Temperature Nonoperating (°C) : –40 to 70
Shock Operating: 2 msec (Gs) : 63
Shock Nonoperating: 1 msec (Gs) : 225
Acoustics Idle (bels—sound power) : 2.05
Rotational Vibration (Rad/sec2) : 12.05
Physical
Height (in/mm) : 1.02/26.11
Width (in/mm) : 4/101.6
Depth (in/mm) : 5.78/146.99
W : 1.58/0.720




anche qui non mi sembra di notare grandi differenze ( anche perchè per l'ES indicano dei dati in più rispetto al fratello) ma sono sicuro che voi le saprete individuare

cmq, io ero indirizzato nel comprare un hd della famiglia barracuda, penso che siano forse i migliori in circolazione per dischi di questa capacità (escludendo dischi scsi, sas & company)

spero che voi mi sappiate indicare qual è il migliore (sia in fatto di prestazioni che in fatto di stabilità e durata) e magari anche un prezzo indicativo per l'ES che non sono riuscito a trovare (mentre il fratello è a circa 290 €)

grazie

[sdjhgafkqwihaskldds]

i caviar SE sono quelli silenziosi

[_mr_]

i caviar SE sono quelli silenziosi

però quale mi consigli tra i due barracuda?