question about HDD ATA and RPM

average_guy · December 10th, 2002

i have a question on a Maxtor 30GB ATA133 7200 RPM harddrive. Does ATA133 means it can transfer 133MB per seconds? and 7200 RPM means 7200 rotation per second? does RPM affect ATA speed? cause i seen some hard drive have ATA133 but only 5400 RPM.

**Kane** · December 10th, 2002

ATA133 is the inerface. The drive in theroy can chuck 133MMB/sec down the bus, but realisticly even a 7,200RPM drive won't reach that rate. RPM affects the transfer speed of the drive. A higher ATA number is simply meaning it's on a faster bus , like AGP 8x which everyone drools over, but nothing takes advantage of.

Sampah · December 10th, 2002

The faster the RPM, the hotter your Harddisk, have to make sure have a good air flow inside the case, but some Harddisk like Maxtor or seagate Barracuda ATA IV or V produce less heat even using 7200 RPM.

**Demigod** · December 10th, 2002

As Kane explained ATA133 provides a theoretical transfer rate of 133 MB/s but it's never actually achieved. Past ATA66 you don't really see any benefits. The RPM (revolutions per minute) mostly affects the access time. The faster the disk spins the faster you can locate data. The RPM speed has a significant impact on performance, although on a well defragmented disk it won't really matter that much.

REi_FoX · December 10th, 2002

actually you wont noticed anything...

so i want to trade my 20gb barracuda on a 40gb HDD

December 10th, 2002

Personally I'd stick with the 5400 RPM drives, the extra heat the 7200 Drives produce just isn't worth it IMO.

average_guy · December 10th, 2002

so you are saying ATA133 doesn't have any extra speed over ATA100 and 7200 RPM isn't much faster than 5400. What if i put 2 hd on 1 cable, 1 hd is ATA 100 and other one is ATA33, would the bus be ATA33 on both hd? or each hd would have separate bus speed?

**Betamax** · December 10th, 2002

:hmm: good question. ATA 66 and higher use a different type of cable to connect the HDD to the mobo. I'm pretty sure that if you used such a cable on an ATA33 drive it wouldn't be spotted by the bios (someone correct me here if I'm wrong). In which case you'd have to use an old ATA 33 cable to connect the drives to the mobo, hence the ATA100 would be limited to ATA33.

average_guy · December 10th, 2002

hmm, i'm using the new cable for both drive, the new cable came with my mobo bought 1 month ago. It works, both drive works just fine.

james.miller · December 10th, 2002

1)
the 7200rpm drives have better seek times and sustained transfer rate (generally). You should see a good improvement with the 7200rpm drives over the 5200rpm drives.

2)
dont even worry about the ata rating - just make sure its ata100 or ata133 - that will ensure you got a modern drives that is faster.

3)
also- yeah there are two types of cable. the old 40 wires ata33 cables and the new 80wire (the wires are thinner) ata100 cable. I DO get better performance fron the 80 wire ata100 cable, but not a huge difference.

4)
if your motherbaord has "Dual FIFO" then both devices attached to the same cable will run at their correct speeds. If not, then both devices will run at the speed of the slowest device.

December 10th, 2002

Quote:

Originally posted by Betamax
:hmm: good question. ATA 66 and higher use a different type of cable to connect the HDD to the mobo. I'm pretty sure that if you used such a cable on an ATA33 drive it wouldn't be spotted by the bios (someone correct me here if I'm wrong). In which case you'd have to use an old ATA 33 cable to connect the drives to the mobo, hence the ATA100 would be limited to ATA33.

Well. I have connected an AT100 drive to an AT66 as slave, but dunno about And connected a NON ata drive to system with AT66/100/133 support and it recognised but did nothing.

REi_FoX · December 10th, 2002

im using a ata 100 cable...

but didnt noticed any changes

Lavos · December 10th, 2002

If your Hard Disk has a large buffer (like mine - 8MB) it gives but overall seek times and increases the performance of your HDD. This is somithing to look out for when buying a new HDD.

Sampah · December 11th, 2002

So what about Serial ATA? how much transfer rate can serial ATA handle?

average_guy · December 11th, 2002

i heard SATA range from 150m/s to 320m/s

**Demigod** · December 11th, 2002

Serial ATA 1.0 will has a transfer rate of 150 MB/s

average_guy · December 11th, 2002

would it actually hit 150m/s? i doubt that.

Alias · December 11th, 2002

No, it is limited by the moving parts of the hard drive (and other factors) just like Parallel ATA is limited.

**Kane** · December 11th, 2002

But it has greater potential, and you don't have to deal with those soddingribbon cables.

james.miller · December 11th, 2002

'potential' being the key word. its going be a good few years before we see that potential finally paying off. AND then, S-ATA will already have been replaced by some other, even faster, interface

December 10th, 2002	#1 (permalink)
average_guy Banned Join Date: Nov 2001 Posts: 0	question about HDD ATA and RPM i have a question on a Maxtor 30GB ATA133 7200 RPM harddrive. Does ATA133 means it can transfer 133MB per seconds? and 7200 RPM means 7200 rotation per second? does RPM affect ATA speed? cause i seen some hard drive have ATA133 but only 5400 RPM.

December 10th, 2002	#2 (permalink)
Kane 邪魔ゎ指せない Join Date: Jan 2002 Location: Gosport, England Posts: 26,255	ATA133 is the inerface. The drive in theroy can chuck 133MMB/sec down the bus, but realisticly even a 7,200RPM drive won't reach that rate. RPM affects the transfer speed of the drive. A higher ATA number is simply meaning it's on a faster bus , like AGP 8x which everyone drools over, but nothing takes advantage of. __________________ >Site Live< Pop over to my site for help with setting up PSX emulators. Help for the Final Fantasies and other RPGs avalaible Celes: (Desktop) Athlon 64 X2 4200+, 2Gb 400MHz DDR Ram, MSI K8N Platinum, GeForce 8800 GTS 320Mb, 500Gb RAID HDD, Vista Business Erika: (MCPC) Athlon XP 2400+, 1Gb 400MHz DDR Ram, geForce 6800 256Mb, 80Gb Hdd, XP 2005 MCE Kimiko: (Desktop 2) Athlon 64 3000+, 512Mb 400MHz DDR Ram, Asus K8V, geForce 6800 128Mb

December 10th, 2002	#3 (permalink)
Sampah The Handsome Man Join Date: Nov 2002 Location: Unlucky Place Posts: 881	The faster the RPM, the hotter your Harddisk, have to make sure have a good air flow inside the case, but some Harddisk like Maxtor or seagate Barracuda ATA IV or V produce less heat even using 7200 RPM. __________________ PROCESSOR: AMD Athlon 64 3000+ @1.8Ghz RAM: Kingstone 512MB PC3200 MOBO: ECS Nforce4 A939 VGA: Pixelview Geforce 6600GT (Golden Limited Edition) 128MB OS: WinXP pro Service pack 2

December 10th, 2002	#4 (permalink)
Demigod これはバタスです Join Date: Jun 2001 Location: Toronto, Ontario, Canada Posts: 5,811	As Kane explained ATA133 provides a theoretical transfer rate of 133 MB/s but it's never actually achieved. Past ATA66 you don't really see any benefits. The RPM (revolutions per minute) mostly affects the access time. The faster the disk spins the faster you can locate data. The RPM speed has a significant impact on performance, although on a well defragmented disk it won't really matter that much. __________________ CPU: Intel Core 2 Quad Q9450 @ 2.66 Ghz (Yorkfield) Mobo: Intel DX48BT2 Memory: 2048 MB PC10600 DDR3 Videocard: PNY Geforce 9800 GX2 PCIe w/ 1024 MB GDDR3 Soundcard: On-board SigmaTel High Definition Audio Hard drive: 300 MB Maxtor & 1 TB Hitachi Optical drive: LG GGW-H20L (2x BD-R DL) OS: Microsoft Windows Vista (32-bit)

December 10th, 2002	#5 (permalink)
REi_FoX ¡¾¡¾¡¾¡ Fantasy ¡¾¡¾¡¾¡ Join Date: Oct 2001 Location: Manila, Philippines Posts: 3,649	actually you wont noticed anything... so i want to trade my 20gb barracuda on a 40gb HDD __________________ FoR PiNoYs WhO WanTs To BuY CheAp ParTs CliCk Here also Here Processor - Intel Quad 2 Quad q6600 G0 Stepping [Stock Settings] Memory - 2GB Team Elite 800mhz Graphics Card - Palit Daytone Geforce 8800 GT 512 MB Mobo - Abit IP-35-E OS - Dual Boot Windows XP Professional SP3 and Ubuntu Linux Pad - PS1 and PS2 > USB Adapter 3DMark05 Score - 35082

December 10th, 2002	#6 (permalink)
ChrisRay Guest Posts: n/a	Personally I'd stick with the 5400 RPM drives, the extra heat the 7200 Drives produce just isn't worth it IMO.

December 10th, 2002	#7 (permalink)
average_guy Banned Join Date: Nov 2001 Posts: 0	so you are saying ATA133 doesn't have any extra speed over ATA100 and 7200 RPM isn't much faster than 5400. What if i put 2 hd on 1 cable, 1 hd is ATA 100 and other one is ATA33, would the bus be ATA33 on both hd? or each hd would have separate bus speed?

December 10th, 2002	#8 (permalink)
Betamax Resident Movie Critic Join Date: Apr 2001 Location: Belfast, Northern Ireland Posts: 9,480	:hmm: good question. ATA 66 and higher use a different type of cable to connect the HDD to the mobo. I'm pretty sure that if you used such a cable on an ATA33 drive it wouldn't be spotted by the bios (someone correct me here if I'm wrong). In which case you'd have to use an old ATA 33 cable to connect the drives to the mobo, hence the ATA100 would be limited to ATA33. __________________ Superior marketing of an inferior product will always win over inferior marketing of a superior product.

December 10th, 2002	#9 (permalink)
average_guy Banned Join Date: Nov 2001 Posts: 0	hmm, i'm using the new cable for both drive, the new cable came with my mobo bought 1 month ago. It works, both drive works just fine.

December 10th, 2002	#10 (permalink)
james.miller Mr. Stupendous Join Date: Nov 2002 Location: Here, There and Everywhere. Posts: 1,132	1) the 7200rpm drives have better seek times and sustained transfer rate (generally). You should see a good improvement with the 7200rpm drives over the 5200rpm drives. 2) dont even worry about the ata rating - just make sure its ata100 or ata133 - that will ensure you got a modern drives that is faster. 3) also- yeah there are two types of cable. the old 40 wires ata33 cables and the new 80wire (the wires are thinner) ata100 cable. I DO get better performance fron the 80 wire ata100 cable, but not a huge difference. 4) if your motherbaord has "Dual FIFO" then both devices attached to the same cable will run at their correct speeds. If not, then both devices will run at the speed of the slowest device. __________________ The HTPC E2160 @ 3.1ghz \| Thermaltake The Orb cooler \| Abit ip35-pro \| 4Gb DDR-II pc6400\| 1.00Tb of WD AAKS storage \| Asus Xonar D2\| 360 HD-DVD drive Pioneer bd204 bluray sata drive \| Corsair HX620w PSU \| *BFG GeForce 8800GTX* \| Silverstone SST-LC17b \| 24" DGM TFT \| 40" 1080p SONY 40w2000 ONKYO TX-SR805 \| bi-amped mission m71i fronts \| eltax center & bipolar rears 2x 12" custom built subwoofers powered by a denon pma-100m \| PS3 with linux and a 250gb 3.5" internal drive \| Nintendo wii

December 10th, 2002	#12 (permalink)
REi_FoX ¡¾¡¾¡¾¡ Fantasy ¡¾¡¾¡¾¡ Join Date: Oct 2001 Location: Manila, Philippines Posts: 3,649	im using a ata 100 cable... but didnt noticed any changes __________________ FoR PiNoYs WhO WanTs To BuY CheAp ParTs CliCk Here also Here Processor - Intel Quad 2 Quad q6600 G0 Stepping [Stock Settings] Memory - 2GB Team Elite 800mhz Graphics Card - Palit Daytone Geforce 8800 GT 512 MB Mobo - Abit IP-35-E OS - Dual Boot Windows XP Professional SP3 and Ubuntu Linux Pad - PS1 and PS2 > USB Adapter 3DMark05 Score - 35082

December 10th, 2002	#13 (permalink)
Lavos Smooth Criminal Join Date: Apr 2002 Location: Space-Time continuum Posts: 165	If your Hard Disk has a large buffer (like mine - 8MB) it gives but overall seek times and increases the performance of your HDD. This is somithing to look out for when buying a new HDD. __________________ The day of Lavos* has arrived!*

December 11th, 2002	#14 (permalink)
Sampah The Handsome Man Join Date: Nov 2002 Location: Unlucky Place Posts: 881	So what about Serial ATA? how much transfer rate can serial ATA handle? __________________ PROCESSOR: AMD Athlon 64 3000+ @1.8Ghz RAM: Kingstone 512MB PC3200 MOBO: ECS Nforce4 A939 VGA: Pixelview Geforce 6600GT (Golden Limited Edition) 128MB OS: WinXP pro Service pack 2

December 11th, 2002	#15 (permalink)
average_guy Banned Join Date: Nov 2001 Posts: 0	i heard SATA range from 150m/s to 320m/s

December 11th, 2002	#16 (permalink)
Demigod これはバタスです Join Date: Jun 2001 Location: Toronto, Ontario, Canada Posts: 5,811	Serial ATA 1.0 will has a transfer rate of 150 MB/s __________________ CPU: Intel Core 2 Quad Q9450 @ 2.66 Ghz (Yorkfield) Mobo: Intel DX48BT2 Memory: 2048 MB PC10600 DDR3 Videocard: PNY Geforce 9800 GX2 PCIe w/ 1024 MB GDDR3 Soundcard: On-board SigmaTel High Definition Audio Hard drive: 300 MB Maxtor & 1 TB Hitachi Optical drive: LG GGW-H20L (2x BD-R DL) OS: Microsoft Windows Vista (32-bit)

December 11th, 2002	#17 (permalink)
average_guy Banned Join Date: Nov 2001 Posts: 0	would it actually hit 150m/s? i doubt that.

December 11th, 2002	#18 (permalink)
Alias >_< Join Date: Jun 2002 Location: East Coast, USA Posts: 924	No, it is limited by the moving parts of the hard drive (and other factors) just like Parallel ATA is limited. __________________ >_<

December 11th, 2002	#19 (permalink)
Kane 邪魔ゎ指せない Join Date: Jan 2002 Location: Gosport, England Posts: 26,255	But it has greater potential, and you don't have to deal with those soddingribbon cables. __________________ >Site Live< Pop over to my site for help with setting up PSX emulators. Help for the Final Fantasies and other RPGs avalaible Celes: (Desktop) Athlon 64 X2 4200+, 2Gb 400MHz DDR Ram, MSI K8N Platinum, GeForce 8800 GTS 320Mb, 500Gb RAID HDD, Vista Business Erika: (MCPC) Athlon XP 2400+, 1Gb 400MHz DDR Ram, geForce 6800 256Mb, 80Gb Hdd, XP 2005 MCE Kimiko: (Desktop 2) Athlon 64 3000+, 512Mb 400MHz DDR Ram, Asus K8V, geForce 6800 128Mb

December 11th, 2002	#20 (permalink)
james.miller Mr. Stupendous Join Date: Nov 2002 Location: Here, There and Everywhere. Posts: 1,132	'potential' being the key word. its going be a good few years before we see that potential finally paying off. AND then, S-ATA will already have been replaced by some other, even faster, interface __________________ The HTPC E2160 @ 3.1ghz \| Thermaltake The Orb cooler \| Abit ip35-pro \| 4Gb DDR-II pc6400\| 1.00Tb of WD AAKS storage \| Asus Xonar D2\| 360 HD-DVD drive Pioneer bd204 bluray sata drive \| Corsair HX620w PSU \| *BFG GeForce 8800GTX* \| Silverstone SST-LC17b \| 24" DGM TFT \| 40" 1080p SONY 40w2000 ONKYO TX-SR805 \| bi-amped mission m71i fronts \| eltax center & bipolar rears 2x 12" custom built subwoofers powered by a denon pma-100m \| PS3 with linux and a 250gb 3.5" internal drive \| Nintendo wii

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