Storage Solutions seagate 1TB ST1000DM003 or ST1000VX000

jinvidia

jinvidia

Adept
Kindly advise me if there is any noteable difference in performance between Seagate 1TB ST1000DM003 and ST1000VX000. The latter is sold for 200 to 300 bucks extra but if the price difference is worth it i dont mind bearing the extra buck.

The VX000 is SV36 series optimized for video surveillance and used mainly for 24/7 work . But i am not going to use my PC 24/7, but apart from this, does this offer any performance/transfer speed , extra warranty or durability or atleast running at a low temperature ?.

I am currently using the DM003 for my PC and i am going to buy one HDD for my DVR for surveillance. If the vx000 fares well then i will swap my existing one with this.


Kindly advise..
thanx
 
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[DOUBLEPOST=1413913232][/DOUBLEPOST]VX series are optimized to work 24x7, but their firmware is designed to keep storing files ie video stream even if there is a slight error in communication, sometime a single bit error. Such error/missing data may cause a slight pixelated frame in stored video file.
 
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jdn said:
VX series are optimized to work 24x7, but their firmware is designed to keep storing files ie video stream even if there is a slight error in communication, sometime a single bit error. Such error/missing data may cause a slight pixelated frame in stored video file.
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IINM this streaming of data at the expense of error correction is only if the surveillance system uses the specialised ATA-7 streaming command set. In a desktop setup, it will use the regular command set and will function as normal.
 
Thanks guys. But is there durability when compared to the dm series?. So is it ok if i go for the dm series for installing in dvr and save the extra buck?
 
Well as said, if your surveillance setup can use the additional command set in the VX series, then it would be preferable going with the VX series.

Durability is anyone's guess and will probably be the same - they both have the same drive configuration : 7200 rpm, 1TB platter. But doesn't the VX series come with a longer 3 year warranty?
 
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Yes its true the VX series is supported for 3 years but i suspect whether both have the same features. I came to know through some forums that the VX series underperforms when it comes to random read/write access as compared to the DM series. Howoever the VX series may fare well with sequential access. I have a lot of MS Word / Wordstar files in my HDD, so i choose the regular DM one.

Moreover i feel the extra 200 buck is less for the additional 1 year warranty the VX offers. So i feel that it seagate might have cut some features and this low price difference is due to the inability to perform well with random access.

What you stated may be true but I want to be on the safer side. So picked the DM series

Anyway thanx pal.
 
I only read about this and didn't query about it. I think it's tomshardware. Moreover that the vx series was not available with the dealer at that time.
And do you have any idea about Toshiba?. The dealer pressed me to take Toshiba Hdd as i am interested in 3 year warranty. But since i have not used it i rejected and picked the seagate.
I hope my decision is not bad. What you say pal?
 
Seems i have confused you..

Mate, prior to buying this hdd i had a hdd in my PC which is the DM series.

Recently there was a requirement for my DVR as the HDD in my DVR died. So i thought of getting a a HDD which offers extra performance for my PC replacing the existing HDD in it and installing the same in the DVR. I came to know about the surveillance version, the VX series. But i read the VX series is not so good in random access, though it might be useful for the DVR.

But as for the DM series except its 2 year warranty ( as opposed to the 3 yr warranty given by VX series) i think it can very well serve as a DVR hdd too. So i picked the DM series for my DVR. So in future if i want to salvage the hdd from the DVR for my PC i can do it without worrying about the random access .

In short, i thought that the VX series will be more advanced / feature rich which can give extra performance in addition to what the DM series offers. But when i came to know about the controversy about the performance it offers, i decided to go with the DM series ignoring the additional warranty it offers.

Hope i made it clear
 
jinvidia said:
But i read the VX series is not so good in random access, though it might be useful for the DVR.
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jinvidia said:
But when i came to know about the controversy about the performance it offers
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Which benchmarking tool was used? Any idea what the random access figures were like? Was a proper VX vs DM benchmark performed like in the tweaktown review? Tried checking THG and came up empty unfortunately.
 
Aftab Ali said:
I wouldn't use a Surveillance drive even it was offered at half the price.
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Except the point being made in this thread is that these 2 specific Seagate drives look to be pretty much the same thing. Seagate stopped their whole 5900 rpm drive lineup only because it was uneconomical for them to manufacture another variant of drives. So they aren't going to make another bunch of different drives even if the label will give you that impression.
Most comments about surveillance drives are made based on the WD surveillance drives which are 5400 rpm drives, and like other 5400 rpm drives, have slower random IO.

Aftab Ali said:
These days the only drives I trust are WD Black/Red.
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Based on what? If you check newegg customer reviews, these are as reliable as every other drive, which doesn't say much. Not to mention, reliability varies based on capacity.
The WD Red, WD Green, WD Purple - can you share your insights on whats so different between them? Wouldn't your statement be contradictory if you found out the WD Red and WD Purple (a surveillance drive) were in fact the same drive?
 
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@Crazy_Eddy Heard that the Seagate Surveillance drives is made to skip a sector if it fails to read it or something. Anyways I have had very negative experience with Seagate. Many times received DOA replacements or replacements that die within a month. These days I use them as a spare backup for my main drives.

I have had WD green drives, they die pretty easily. Blue is the one that offers balanced reliability and performance, but the warranty period is a deal killer for me. And don't tell me you trust the Newegg costumer review stats, they are unreliable. I have had a lot of WD Blacks, only 10% of them have ever died on me. And maybe Red and Purple uses the same drive, I don't have any idea about Purple drives.
 
Aftab Ali said:
@Crazy_Eddy Heard that the Seagate Surveillance drives is made to skip a sector if it fails to read it or something
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I've heard these rumours as well. 5 mins of searching would have been enough to find out that this statement is a misinterpretation.

I mentioned this in post #3 above, but let me say it again : skipping errors is part of an optional/extended 'streaming command set' that *could* be supported by your surveillance system. It you plug in the drive to a desktop PC, the default command set is used, not this streaming command set which is most likely not supported on desktop SATA controllers.

Search for "ATA7 streaming command set" for more on this. Here's the official documentation on the standard : http://www.t13.org/Documents/UploadedDocuments/docs2013/d2161r5-ATAATAPI_Command_Set_-_3.pdf (Check : 4.23 Streaming feature set)
"The Streaming feature set allows a host to request delivery of data within an allotted time, placing a priority on the time to transfer the data rather than the integrity of the data."
When recording surveillance video, if a few bytes are missed due to errors, its alright since it will result in only a few bad pixels. OTOH, if the drive stops and tries to correct the data errors, the video camera is still sending data and you might have a buffer overrun and lose much more data which could run into a couple of seconds of video. For surveillance applications, that is not acceptable.

Consider RAID oriented drives like the WD Red which have a feature called TLER (time limited error recovery), i.e. they will not perform error correction if the process exceeds a few seconds, or else they risk being dropped from the RAID array. Will you go around saying WD Red drives skip error correction and so should not be used for data too? :p

I hope this is clear. Now can we please make informed posts instead of repeating false statements!


Aftab Ali said:
And don't tell me you trust the Newegg costumer review stats, they are unreliable. I have had a lot of WD Blacks, only 10% of them have ever died on me.
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Whats the difference between you and a newegg customer? Aren't you both owners of the drives you are reviewing? The truth is there's too much variation to give a definite answer as to which series is better. Anyone saying that drive x is more durable without having simultaneously tested all other drives in the same environment for atleast a couple of years, is just guessing based on his luck.
 
@Crazy_Eddy That's some nice info. I wasn't aware about the ATA7 command set. And yeah I guess it was my bad luck that all the Seagates I have owned died on me, but then again my luck is pretty shitty when it comes to HDD.
 
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