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Author Topic: Best HDD for CRU drive
Biraj Thakuri
Film Handler

Posts: 11
From: Nepal, Pokhara 11
Registered: Sep 2017


 - posted 09-22-2018 12:07 AM      Profile for Biraj Thakuri   Email Biraj Thakuri   Send New Private Message       Edit/Delete Post 
Dear all,
I have a CRU drive DX115 that we use for transporting features from distributors to us. It has a lot of bad sectors and needs to be replaced.It currently has a Toshiba 1 TB hd in it.

I was thinking what is the best HDD for the CRU for this purpose?
For e.g. WD Red or Seagate Barracuda. Fastest and long lasting.

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Carsten Kurz
Film God

Posts: 4340
From: Cologne, NRW, Germany
Registered: Aug 2009


 - posted 09-22-2018 02:52 AM      Profile for Carsten Kurz   Email Carsten Kurz   Send New Private Message       Edit/Delete Post 
It doesn't matter much. How large are these features? If this drive is shipped around often, you may consider buying an ssd of decent size, as it doesn't suffer from mechanical impacts. As SSD prices are currently going down, you may get away with a 512GB SSD. If that is too expensive or too small, and 1 or 2 TB ssd too expensive as well, you might try a 2.5" drive - they are usually built to survice mechanical stress better than their 3.5" counterparts. I have seen many CRU drive carriers with 2.5" drives built-in.

- Carsten

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Scott Norwood
Film God

Posts: 8146
From: Boston, MA. USA (1774.21 miles northeast of Dallas)
Registered: Jun 99


 - posted 09-22-2018 07:46 AM      Profile for Scott Norwood   Author's Homepage   Email Scott Norwood   Send New Private Message       Edit/Delete Post 
Do not get an "advanced format drive"--get a normal one with 512 bytes per sector. Avoid anything larger than 2TB. Also, I always recommend "enterprise" drives (e.g. Hitachi Ultrastar, Seagate Constellation, Western Digital Gold) over consumer-grade drives. Hitachi seems to be the most reliable at the moment. They are owned by Western Digital, but still a distinct product.

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Leo Enticknap
Film God

Posts: 7474
From: Loma Linda, CA
Registered: Jul 2000


 - posted 09-22-2018 01:56 PM      Profile for Leo Enticknap   Author's Homepage   Email Leo Enticknap   Send New Private Message       Edit/Delete Post 
If there's a significant cost difference between enterprise and consumer grade, is that really worth paying for a drive that is for content distribution (i.e. will clock up relatively few hours) drive, and not for RAID use?

Admittedly, 2TB enterprise and NAS drives are now so close in price to their consumer equivalents here ($90ish v. $70ish the last time I looked), that it's not a big issue. But if the price difference is greater in Nepal, it might be.

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Scott Norwood
Film God

Posts: 8146
From: Boston, MA. USA (1774.21 miles northeast of Dallas)
Registered: Jun 99


 - posted 09-22-2018 02:18 PM      Profile for Scott Norwood   Author's Homepage   Email Scott Norwood   Send New Private Message       Edit/Delete Post 
One would need to do a large-scale study on this to come to a valid conclusion, but I would look at it this way: someone took the time and spent the money to make a movie. If spending an extra (say) $100 will reduce the risk of a failed screening, wouldn't it make sense to do so? The price difference won't even register on the scale of a film production, and even the most expensive drive will be cheaper than a 35mm print.

If nothing else, the longer warranty is probably worth the cost alone.

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Gordon McLeod
Film God

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From: Toronto Ontario Canada
Registered: Jun 99


 - posted 09-22-2018 02:35 PM      Profile for Gordon McLeod   Email Gordon McLeod   Send New Private Message       Edit/Delete Post 
I would suspect that cru hard drives fail more from repeated transportation rather than wearing out so i doubt that NAS or Enterprise drives are worth the extra cost as it will probably be dropped first

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Leo Enticknap
Film God

Posts: 7474
From: Loma Linda, CA
Registered: Jul 2000


 - posted 09-22-2018 04:20 PM      Profile for Leo Enticknap   Author's Homepage   Email Leo Enticknap   Send New Private Message       Edit/Delete Post 
Those are both arguments in favor of SSDs for DCP distribution. As Gordon notes, the biggest threat is from mechanical shock damage in transportation, which an SSD is far more resilient against than a spinning rust drive (of any grade). As a 500GB drive (which will store pretty much the largest DCP in existence) is now down to around $100, Scott's argument becomes pretty compelling.

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Steve Guttag
We forgot the crackers Gromit!!!

Posts: 12814
From: Annapolis, MD
Registered: Dec 1999


 - posted 09-23-2018 02:40 PM      Profile for Steve Guttag   Email Steve Guttag   Send New Private Message       Edit/Delete Post 
I see no point in an Enterprise drive for CRU use. A desktop or, in particular, laptop drive would likely be best. A CRU drive isn't going to have a RAID to back it up so having a drive that will re-read a bad sector more times trying to get the data is going to be better.

I also could see where SSDs could be a benefit here.

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Scott Norwood
Film God

Posts: 8146
From: Boston, MA. USA (1774.21 miles northeast of Dallas)
Registered: Jun 99


 - posted 09-24-2018 11:46 AM      Profile for Scott Norwood   Author's Homepage   Email Scott Norwood   Send New Private Message       Edit/Delete Post 
SSDs are great, but they do have data-retention problems if they sit on the shelf for some length of time (a year or more, more or less). This might be an issue for an unpopular title. Of course, regular hard disks aren't really made for shelf-stable storage, either.

Enterprise mechanical disks are about more than MTBF--they have a lower bit error rate tend to be constructed to be less sensitive to vibration, when compared with garden-variety hard disks.

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Biraj Thakuri
Film Handler

Posts: 11
From: Nepal, Pokhara 11
Registered: Sep 2017


 - posted 09-24-2018 09:33 PM      Profile for Biraj Thakuri   Email Biraj Thakuri   Send New Private Message       Edit/Delete Post 
quote: Carsten Kurz
It doesn't matter much. How large are these features? If this drive is shipped around often, you may consider buying an ssd of decent size, as it doesn't suffer from mechanical impacts. As SSD prices are currently going down, you may get away with a 512GB SSD. If that is too expensive or too small, and 1 or 2 TB ssd too expensive as well, you might try a 2.5"
The size depends upon the no. of features released that day. Max I have received is 5 at one time. Maybe 1 TB is necessary at times like this. Yes the drive is cargo-ed by airways.

quote: Scott Norwood
Do not get an "advanced format drive"--get a normal one with 512 bytes per sector. Avoid anything larger than 2TB. Also, I always recommend "enterprise" drives (e.g. Hitachi Ultrastar, Seagate Constellation, Western Digital Gold) over consumer-grade drives. Hitachi seems to be the most reliable at the moment. They are owned by Western Digital, but still a distinct product.
Yes I was thinking the same larger than 2TB is a overkill and I have not got verified information about the reliability of enterprise drives. They are better and faster right?

quote: Leo Enticknap
If there's a significant cost difference between enterprise and consumer grade, is that really worth paying for a drive that is for content distribution (i.e. will clock up relatively few hours) drive, and not for RAID use?
I haven't seen the Cost difference but they must be not that great. Yes they are only for content distribution and maybe a bit reliable than consumer grade

quote: Scott Norwood
One would need to do a large-scale study on this to come to a valid conclusion, but I would look at it this way: someone took the time and spent the money to make a movie. If spending an extra (say) $100 will reduce the risk of a failed screening, wouldn't it make sense to do so? The price difference won't even register on the scale of a film production, and even the most expensive drive will be cheaper than a 35mm print.

Yes It makes sense to spend a little more on the medium rather than having a failed screen. So you are suggesting to go with the SSDs?

quote: Leo Enticknap
Those are both arguments in favor of SSDs for DCP distribution. As Gordon notes, the biggest threat is from mechanical shock damage in transportation, which an SSD is far more resilient against than a spinning rust drive (of any grade). As a 500GB drive (which will store pretty much the largest DCP in existence) is now down to around $100, Scott's argument becomes pretty compelling.
Yes Looking into it investing in SSDs is more favourable in terms of speed and reliability but the size maybe the issue as larger size SSDs are ridiculously expensive.

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Carsten Kurz
Film God

Posts: 4340
From: Cologne, NRW, Germany
Registered: Aug 2009


 - posted 09-25-2018 02:57 PM      Profile for Carsten Kurz   Email Carsten Kurz   Send New Private Message       Edit/Delete Post 
As I said, if 1 or 2 TB SSDs are too expensive currently, then buy 1 or 2 TB 2.5" notebook drives. They are built to be shuffled around. More than 3.5" drives at least.

- Carsten

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