Monday, April 5th 2010

New WD VelociRaptor HDD to Take HDD Closest to SSD

by
btarunr
 Discuss (76 Comments)
First surfaced earlier this year, Western Digital (WD) is just about ready with its newest line of VelociRaptor high-performance hard drives. The second generation of VelociRaptor will take a shot at much expensive solid state drives on two fronts: transfer speeds and access times, at highly competitive price-per-gigabyte. With transfer speeds, the new VelociRaptor drives offer sustained read speeds of 145 MB/s, while having access times of 3 ms, as close as it gets to flash storage. These are conventional (Winchester) hard drives with spindle-speeds of 10,000 rpm, double the areal density as its previous generation and having an onboard cache of 32 MB, with the standard SATA 6 Gb/s interface.

The actual drives come in thick 2.5" form-factor, with a 3.5" bay mounting frame that also serves as a heatsink since it has aluminum ridges. The drives have a noise-output of up to 37 dBA. WD rates its MTBF at 1.4 million hours, and backs it with a five-year company warranty. The drives come in capacities of 150 GB, 300 GB, 450 GB, and 600 GB with prices expected to be highly competitive with SSDs in terms of price-per-gigabyte, given its performance level.
Source: TechConnect Magazine

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76 Comments on New WD VelociRaptor HDD to Take HDD Closest to SSD

#51
ACEkombatkiwi
TheLaughingManStill not needed. As he was explaining, your total through put is not based on the SATA channel max, but the SATA total throughput for all channels used. As such, each new SATA lane you add, the more throughput you get.

Example:
1 HDD + 1 SATA2 plug = 300 MB/s max theoretical
2 HDD + 2 SATA2 plug = 600 MB/s max theoretical
3 HDD + 3 SATA2 plug = 900 MB/s max theoretical
4 HDD + 4 SATA2 plug = 1200 MB/s max theoretical
etc. as each HDD will have their own SATA lane to themself

This HDD will never full saturate a SATA 2 lane, so have all the extra throughput from a SATA 3 setup is pointless cause it will never be used.
Thanks i was always under the impression that you are bound by the sata limit of 300mb total not per channel.
Posted on Reply
#52
TheLaughingMan
ACEkombatkiwiThanks i was always under the impression that you are bound by the sata limit of 300mb total not per channel.
No prob. common mistake that got carried over from the IDE days when devices shared a connection lane in a master/slave setup.

Good rule of thumb is the water pipe analogy. Every time you add a connection (new SATA wire in this case, going from x4 to x8 on PCIe, etc.) you are adding more 2 way pipes. Going from SATA 2 to SATA 3 you are switching to larger pipes. RAID works by interconnecting the pipes at the receiving station. Each water source still has its own pipe, but overall water flow is increased because the pumping station is using multiple pipes as a water source. SSD's are like getting water from a pumping station instead of a river in the respect that the pumping station will have water already on hand and under pressure. While an HDD is like a river. It has more water and you can funnel it to get pressure, but not as quickly or as high a pressure level the pumping station.

Sorry, for the lesson. I have taught computer basics before and the water and car analogies get used a lot.
Posted on Reply
#53
WarEagleAU
Bird of Prey
170 bucks for a 600GB Velociraptor??? Hell count me in. I see the read speeds as good, but they do not mention the writes speeds or the I/Ops of it...
Posted on Reply
#54
TheLaughingMan
WarEagleAU170 bucks for a 600GB Velociraptor??? Hell count me in. I see the read speeds as good, but they do not mention the writes speeds or the I/Ops of it...
If it is anything like its older brother, it should have about the same for write speed would be my guess. Say 140ish MB/s sustained writes. Keep in mind this is probably leaked info. since the actually drive specs besides, now, size of the drive offerings have not been officially released.
Posted on Reply
#55
Unregistered
Need a comparison real fast with the current 300GB VelociRaptor!!!!!!! NOW!!!!!!!! :toast::rockout:
yogurt_21as cool as this is it really feels like it's time to move over to ssd and stop trying to get the raptor to compete. I mean sure I have several raptors in my home rigs but that's when ssd's were 1k or more for 32-64gb, now you can get s 270read/250 write 128gb for 300$. for me that's plenty for a primary drive and then I'd raid several 2tb drives for storage.
Not to sound like a fanboi, but as far as I know an average SSD doesn't last more than 5 years, while my good ol' 60GB HDD is still kicking for more than 10 years now...
#57
Hayder_Master
thnax WD, im tired from problems of old fashion HDD's , no more Cylinders please
Posted on Reply
#58
pr0n Inspector
I would gladly paid for an inherently silent SSD over a noisy hard drive. in fact, I did. X25M FTW!
Posted on Reply
#60
Perra
Wow... those prices are insane. No way I'm getting one of these for that kind of money. Intel SSD here I come.
Posted on Reply
#61
Delta6326
Dang those are really Pricey ima stick to my WD black for now was really hoping i could get a VelociRaptor. but if i do ever get them is the SATA backwards compatible?
Posted on Reply
#62
Perra
Delta6326Dang those are really Pricey ima stick to my WD black for now was really hoping i could get a VelociRaptor. but if i do ever get them is the SATA backwards compatible?
Yep, it is.
Posted on Reply
#64
95Viper
TheLaughingManStill not needed. As he was explaining, your total through put is not based on the SATA channel max, but the SATA total throughput for all channels used. As such, each new SATA lane you add, the more throughput you get.

Example:
1 HDD + 1 SATA2 plug = 300 MB/s max theoretical
2 HDD + 2 SATA2 plug = 600 MB/s max theoretical
3 HDD + 3 SATA2 plug = 900 MB/s max theoretical
4 HDD + 4 SATA2 plug = 1200 MB/s max theoretical
etc. as each HDD will have their own SATA lane to themself

This HDD will never full saturate a SATA 2 lane, so have all the extra throughput from a SATA 3 setup is pointless cause it will never be used.
This was true in the previous SATA versions, but no longer, if the option is implemented in Serial ATA Revision 3.0; the devices will be able to share a host SATA port. How about 4 or 5 drives on a single port.

See, Q4 and A4 here.
Posted on Reply
#65
Mussels
Freshwater Moderator
95ViperThis was true in the previous SATA versions, but no longer, if the option is implemented in Serial ATA Revision 3.0; the devices will be able to share a host SATA port. How about 4 or 5 drives on a single port.

See, Q4 and A4 here.
that can be done in sata II with port multipliers anyway. point is - you dont have to, therefore you dont have to share bandwidth.
Posted on Reply
#67
Makaveli
TAViXNeed a comparison real fast with the current 300GB VelociRaptor!!!!!!! NOW!!!!!!!! :toast::rockout:



Not to sound like a fanboi, but as far as I know an average SSD doesn't last more than 5 years, while my good ol' 60GB HDD is still kicking for more than 10 years now...
And this statement is based on what fact?
Posted on Reply
#68
Mussels
Freshwater Moderator
MakaveliAnd this statement is based on what fact?
its well known that SSD's have short lifespans, especially as OS drives.
Posted on Reply
#69
nt300
MakaveliAnd this statement is based on what fact?
Musselsits well known that SSD's have short lifespans, especially as OS drives.
How long is the life compare to HDD, I though with TRIM support SSD last very long.
Posted on Reply
#70
Mussels
Freshwater Moderator
nt300I think if you have TRIM with SSD they will last very long, longer than mechanical drive imo.
hmmm, not sure on outlasting mechanicals, but yes - trim does help a lot.
Posted on Reply
#71
Trigger911
Aleksander DishnicaWhy did they produce it with sata III and not Sata I or II if it does not utilizes the whole bandwidth???
All drive manufactors do that its th zing that gets you to buy to even get close to maxing sata you gotta buy SAS drives like I got.:rockout:
Posted on Reply
#72
Unregistered
Musselshmmm, not sure on outlasting mechanicals, but yes - trim does help a lot.
It helps, but the Windows swap file kills the SSD slowly in time...:shadedshu
#73
95Viper
TAViXNeed a comparison real fast with the current 300GB VelociRaptor!!!!!!! NOW!!!!!!!! :toast::rockout:
Here: Benchmarks
Musselsthat can be done in sata II with port multipliers anyway. point is - you dont have to, therefore you dont have to share bandwidth.
Oh, that is fine, but my point is that; if implemented, you could. And, with the extra bandwidth of SATA 3 it would be feasible: and less likely than SATA 2 that you would saturate the port with 4 or 5 HDDs/SSDs.

:)
Posted on Reply
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