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Showing posts with label Storage. Show all posts
Showing posts with label Storage. Show all posts

Thursday, November 24, 2011

SSD (Solid Storage) Hierarchy Chart

We understand that SSD prices make it difficult to adopt the latest technology. Maybe that's why you aren't too keen on blowing a couple hundred dollars on solid-state storage, especially when you can spend the same amount and buy four 2 TB hard drives or a high-performance processor. That's why it's important to put things into perspective.
Over the past five years, CPU performance has hit new and unforeseen heights, and processors are increasingly spending time waiting on data from hard drives. This is what makes storage today's most glaring bottleneck. Overcoming it requires an SSD.
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As a point of comparison, a file operation completes 85% faster on a low-end SSD than it does on a high-end hard drive, but there is only an 88% speed difference between a high-end hard drive and a high-end SSD. That why you shouldn't let less aggressive benchmark results at the low-end deter you from making the switch. You don't have to have the best SSD to get great performance relative to a hard drive.
This hierarchy chart relies on information provided in our Storage Bench v1.0, as it ranks performance in a way that reflects average daily use for a consumer workload. This applies to gamers and home office users. The chart has been structured so that each tier represents a 10% difference in performance. Some rankings are educated guesses based on information from testing a model at a different capacity or a drive of similar architecture. As such, it is possible that an SSD may shift one tier once we actually get a chance to test it. Furthermore, SSDs within a tier are listed alphabetically.
There are several drives that we're going to intentionally leave out of our hierarchy list. Enterprise-oriented SLC- and 512 GB MLC-based SSDs are ignored due to the extreme price they command (and the difficult we have getting samples in from vendors). Furthermore, SSDs with a capacity lower than 60 GB are left off because of the budget nature of that price range.

Wednesday, November 9, 2011

Netgear's Marvell Based ReadyNAS NV+ v2 Review


Netgear's ReadyNAS lineup is very well respected in the industry. This lineup owes its existence to the acquisition of Infrant in 2007. After acquiring Infrant, Netgear moved away from the custom RAID controllers (based on the LEON SPARC core [PDF]) in favour of Intel x86 based solutions. However, Intel based solutions are too costly for the mid-range SMB market. We have already seen vendors like Synology and LG using Marvell based controllers in their systems. Netgear is also moving to a Marvell based solution for this market with the products introduced today.

The 2-bay Duo v2 is meant to replace the existing ReadyNAS Duo and the 4-bay NV+ v2 is meant to replace the existing ReadyNAS NV+. Compared to the Ultra and Ultra Plus series, these solutions are much cheaper. They also sacrifice some features such as NFS and iSCSI. These are not used by a majority of the consumers in the economical prosumers segment. Hardware wise, both the products carry only one GbE port (compared to the two ports in the Ultra lineup). The table below presents the various home NAS models from Netgear.

Netgear's suggested pricing for today's introductions is presented below:

Netgear doesn't offer any specifics on the platform except for indicating 'Marvell Smart' in the packaging and a 1.6 GHz CPU at the core. Both the Duo v2 and NV+ v2 run on the same CPU, with the number of bays being the only difference. A look at the pricing table above reveals that the units compete in the same class as that of the LG N2A2 NAS that we reviewed a couple of months ago. Is the platform same? How does the performance stack up? We will see the answers to these questions in the next few sections.