Tag Archives: Savvio

HP moves to 300GB SAS

75% less power and 70% less space than 3.5″ drives


HP’s making the move to 300GB 2.5″ SAS drives.  The Seagate-built drive is twice the capacity of previous 2.5″ SAS drives.  HP began shipping the Savvio 10K 300GB SAS drive worldwide to resellers this week.

This is another step in the rapid enterprise storage form factor transition underway.  2.5″ is mainstream for datacenters  starting now.


2.5″ enterprise drives cross the storage system barrier

Savvio is the world’s fastest drive – and uses up to 75% less power than 3.5″ drives


Seagate has rolled out a new generation of  Savvio 2.5″ enterprise drives.  They have better capacity, performance and power efficiency, of course.  But the really big news? These drives signal the performance/capacity/power crossover point between 3.5″ and 2.5″ drives. 

So for a 24-drive 2.5″ 10K rpm storage system vs. a 12-drive 3.5″ 15K rpm storage system:

  • Capacity is now the same (up to 300GB for 2.5″, up to 600GB for 3.5″)
  • Performance is 60% higher
  • Power consumption is 20% lower 

Until now, 2.5″ drives had won over the server market but not the storage system market.  Lower power 2.5″ drives didn’t make up for the cumulative power impact of packing twice as many drives into a single system.  And 2.5″ capacities peaked at 147GB.

No longer!  Expect to see accelerated adoption of 2.5″ into high performance storage systems.

2.5″: the new disk drive sweet spot

500GB, 7200 rpm – who needs 3.5″?

Seagate announced two new 500GB notebook drives.  So what?

  • The 50-year history of the disk drive is all about cramming more and more bytes on less and less real estate.  The real estate shrinks when drive formats drop a size.
  • 500GB 2.5″ drives mean we’re close to not needing the capacity advantage of 3.5″ drives. It’s the beginning of the end for the 3.5″ form factor.  Servers have mostly made the switch with 2.5 SAS drives like Seagate’s Savvio.
  • 500GB 2.5″ 7200 rpm drives mean notebooks can get desktop performance without sacrificing capacity.  Expect rapid adoption of 7200 rpm vs. 5400 rpm in notebooks now that there is capacity parity and less of a premium in power consumption.

SATA drives may have peaked in the enterprise

SAS drives get bigger and smaller to take share from SATA for business applications

IDC data from InfoStor shows this year and next are the golden age of SATA drives in the enterprise. 

It’s not that the trend for high capacity storage abates in the future; it’s that SAS drives are expanding their capabilities to replace SATA in many applications. 

Why settle for an interface originally designed for PCs if you can get the same thing in SAS for a little bit more?

SATA drives won’t go away of course – they still provide the most capacity for the dollar.  If it’s good enough for an application, people will continue to use it. 

Have you made the jump to SAS?  Why or why not?

Dell opens the floodgates for 2.5″ enterprise storage

Becomes the first major supplier to offer a 2.5″ SAS storage system


Dell uncharacteristically took the role of technology leader and launched the MD1120, a direct-attach storage system with 2.5″ SAS drives for their PowerEdge servers (thanks Blocks and Files). It’s likely that their major competitors (and others) will follow with their own announcements in the near future.

Why 2.5″ SAS?

Make no mistake – they may be small, but they are the cream of the crop.  Fastest (for 10K rpm), most reliable, highest data integrity.  Oh – and they use less space and a lot less power than 3.5″ drives.

Don’t confuse 2.5″ SAS drives with notebook drives.  They’re similar in size, but that’s about the only thing they have in common.

The beginning of the end for 3.5″ enterprise drives

The only fatal flaw for 2.5″ and storage has been capacity. These drives are already the standard for servers, but storage system makers couldn’t make the numbers work with only 147GB per drive. 

It looks like 300GB may be the tipping point.  Seagate recently launched the first 300GB 2.5″ SAS drive, the Savvio 10K.3. 

What’s your 2.5″ storage plan?  Is it time?

Is enterprise storage ready for 2.5″ drives?

Servers are already there; 300GB could be the tipping point for storage systems

Seagate announced a 300GB version of its Savvio 10K rpm drive, the highest 2.5″ SAS capacity yet available.  Is this the dawning of the Age of Small Form Factor for enterprise storage?  Information Week thinks so.

The server market has already made the turn.  HP and other high-volume server makers have committed to 2.5″ SAS drives for performance servers.  Power, size and reliability benefits make it a no-brainer.  And while 2.5″ hasn’t yet taken over servers from system builders, the switchover has begun.

For storage systems, the capacity just hasn’t been there. At 300GB, it may be.  A 2.5″ drive is 70% smaller than 3.5″ SAS drives, which max out at 450GB today (although 600 GB will be along before long). 

What say you?  How are you using 2.5″ 10K or 15K drives in storage applications today?

Pillar rebuilds fast, but is it fast enough?

Even best-in-class rebuild times expose data to hours of risk

Blocks and Files points to an Demartek study (sponsored by Pillar) showing that the Pillar Axiom 500 rebuild times are much shorter on high capacity arrays that similar EMC or NetApp systems.

The glaring data beyond Pillar’s performance, though, is the teeth-clenchingly long times that data is one drive failure away from catastrophic loss in every case. 

The tests were conducted with about 50 500GB drives per system using RAID 5 (RAID 4 for NetApp), meaning the arrays can be rebuilt if one drive fails, but not two.  So during the rebuilds of from 3 to 23 hours, if another drive fails, all data is lost. 

Insert 1 TB drives into the equation, and your rebuild time (and vulnerability) doubles.

RAID 6 and other dual-failure protective schemes make this problem go away, but cost a little in capacity. 

How are you dealing with this?  I’ve heard that RAID 6 is gaining traction for 7200 rpm high capacity enterprise drives like Seagate’s Barracuda ES that are less reliable than 15K SAS enterprise drives (see Seagate’s 3.5″ Cheetah and 2.5″ Savvio for reference). 

Does your RAID vary by drive class?  What other magic do you apply to make this work?