[mnassour]

http://www.theregister.co.uk/2008/07/10/seagate_1point5tb_hdd/

It looks like Seagate is getting ready to go to 1.5TB. Let's see....how many hours of HD is that?

From theregister.co.uk....

One terabyte hard drives still cramping your decadent data storage lifestyle? No more tears. Seagate is rolling out 1.5TB HDDs this August.

Seagate's 1.5TB Barracuda 7200.11 will use four platters to cram the scale-tipping new raw capacity into an eleventh generation of its flagship drive. The storage firm points out its the single largest hard drive capacity bump in the last 50 years.

As the name suggests, the HDD spins at 7,200RPM. The 3Gb/s SATA I interface has a sustained data rate of up to 120MB/s.

Apologies if this is being discussed elsewhere...it didn't turn up in my search.

 

[Paul A]

http://www.theregister.co.uk/2008/07/10/seagate_1point5tb_hdd/

It looks like Seagate is getting ready to go to 1.5TB. Let's see....how many hours of HD is that?

From theregister.co.uk....

Apologies if this is being discussed elsewhere...it didn't turn up in my search.

I was just getting ready to post the same news. This is fantatic.

What is the largest amount of data storage that current DirecTv DVRs can access?

I've got a ton of stuff on my 1TB and I still have 40% left.

Paul

 

[Drew2k]

Here's an earlier post in the Computer forum: http://www.dbstalk.com/showthread.php?t=132896

 

[evan_s]

I believe I've seen reports of external drives with 2 1tb dives set to stripe or act like one big drive working just fine with the receivers so 1.5tb shouldn't be a problem.

 

[Paul A]

I believe I've seen reports of external drives with 2 1tb dives set to stripe or act like one big drive working just fine with the receivers so 1.5tb shouldn't be a problem.

So could we use 2 1.5TB to access 3TB in raid 0?

Has anyone used more the 2 TBs?

Thats' a boatload of recording!!

 

[armophob]

Let's see....how many hours of HD is that?

By my estimate about 250hrs of HD

 

[cartrivision]

By my estimate about 250hrs of HD

1TB will give you about 250 hours of MPEG4 HD recording. 1.5TB will give you about 400 hours of MPEG4 HD.

 

[1948GG]

http://www.theregister.co.uk/2008/07/10/seagate_1point5tb_hdd/

It looks like Seagate is getting ready to go to 1.5TB. Let's see....how many hours of HD is that?

All the major drive manufacturers have announced plans for drive up to at least 3TB in a single enclosure (non-RAID), time lines for releases are out to around 2-3 years from now, with expansion above that to around 5+TB expanding the line in later years.

Of course, the OS has to support it. The form of Linux that DirecTV currently uses for the HR series dvr's will only support 2TB max, so many folks (me included) have been running Raid array's for a pretty long time. As drive prices have dropped, it would be nice if DirecTV would upgrade the OS to support larger systems, or (NO, really?) do what their competition is doing, actually do MRV. Then one could have multiple 2TB systems 'ganged' together.

But larger single drives sure make it easy and cheap to add boatloads of space.

 

[armophob]

1TB will give you about 250 hours of MPEG4 HD recording. 1.5TB will give you about 400 hours of MPEG4 HD.

Here is my math. 300g hard drive in my HR20 holds 100 episodes of Alton Brown good eats HD at 1/2 hour increments = 50hrs of HD. 1.5t divided by 300g = 5. 500 episodes of Good Eats = 250 hours of HD.

 

[Sirshagg]

Here is my math. 300g hard drive in my HR20 holds 100 episodes of Alton Brown good eats HD at 1/2 hour increments = 50hrs of HD. 1.5t divided by 300g = 5. 500 episodes of Good Eats = 250 hours of HD.

Between all the content I record - 99% HD, 50-50 mpeg2 vs mpeg4 I get on average about 210 hours per 1TB drive. 50% more = just over 300 hours.

 

[cartrivision]

Between all the content I record - 99% HD, 50-50 mpeg2 vs mpeg4 I get on average about 210 hours per 1TB drive. 50% more = just over 300 hours.

That pretty much jibes with my previous estimate of 400 hours of MPEG4 HD recording with a 1.5TB disk, since your total recording time includes about 150 hours of MPEG2 HD.

Here is my math...

A 1.5TB disk has slightly more than 50% more "user available" space than a 1TB disk. It's about (1.5 - 0.1) / (1.0 - 0.1) = 55.6% more, where the 0.1 in the equation is the 100MB of reserved space that the DVR holds back for other uses. That 55.6% would take your 210 hours on a 1TB disk to 326 hours on a 1.5TB disk, and if the 150 hours of MPEG2 HD on your disk was instead MPEG4, that would easily put you over 400 hours of HD on a 1.5TB disk.

 

[Paul A]

That pretty much jibes with my previous estimate of 400 hours of MPEG4 HD recording with a 1.5TB disk, since your total recording time includes about 150 hours of MPEG2 HD.

Here is my math...

A 1.5TB disk has slightly more than 50% more "user available" space than a 1TB disk. It's about (1.5 - 0.1) / (1.0 - 0.1) = 55.6% more, where the 0.1 in the equation is the 100MB of reserved space that the DVR holds back for other uses. That 55.6% would take your 210 hours on a 1TB disk to 326 hours on a 1.5TB disk, and if the 150 hours of MPEG2 HD on your disk was instead MPEG4, that would easily put you over 400 hours of HD on a 1.5TB disk.

Tasty. So....

How many GBs does it take to record 1 hour of MPEG4?

How many GBs does it take to record 1 hour of MPEG2?

 

[Paul A]

Between all the content I record - 99% HD, 50-50 mpeg2 vs mpeg4 I get on average about 210 hours per 1TB drive. 50% more = just over 300 hours.

Sirshagg, how does one know whether they are recording MPEG2 or MPEG4. Is D10 exclusively broadcasting MPEG4?

Paul

 

[DarinC]

Anything on 99 or 103 will be MPEG4, everything else will be MPEG2. But in the near future, the MPEG2 HD channels are being transferred over to MPEG4.

 

[Richierich]

1TB will give you about 250 hours of MPEG4 HD recording. 1.5TB will give you about 400 hours of MPEG4 HD.

If you get 250 Hours with 1TB then 1.5TB is 150% more space or 375 Hours of MPEG-4 HD Recording (250 plus 50% of 250 = 125 = Total of 375).

 

[Ken S]

Here is my math. 300g hard drive in my HR20 holds 100 episodes of Alton Brown good eats HD at 1/2 hour increments = 50hrs of HD. 1.5t divided by 300g = 5. 500 episodes of Good Eats = 250 hours of HD.

It will actually hold more because the amount of data area that DirecTV reserves for Showcase/Movies Now is fixed and not a percentage of the total drive.

So, a 320GB Drive which has about 280GB of data space after housekeeping and then 50GB(?) of Showcase space gives you 230GB for all those Good Eats.

A 1TB Drive which is going to end up with about 900GB of data space after housekeeping and then 50GB of Showcase space gives you 850GB for Good Eats

and so on...

 

[Spanky_Partain]

That is a lot of VegieTales for the grand kids! That should put them to sleep!

 

[cartrivision]

If you get 250 Hours with 1TB then 1.5TB is 150% more space or 375 Hours of MPEG-4 HD Recording (250 plus 50% of 250 = 125 = Total of 375).

It's even more than that, since increasing from a 1TB disk to a 1.5YB disk gives you 55% more space, not just 50% more. See my post above for why 1.0 --> 1.5 equals 55% more.

 

[Richierich]

I remember reading somewhere here in this forum that the current limitation is 2 TB, is that correct???

 

[evan_s]

yes the current limit on the receivers is a 2tb drive.