Recent content by sub.mesa

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SSD vs Raptor

I guess you misunderstood. I meant that you only need backups to protect against URE for the last ~7 years, not before. Simple math of probability. This has nothing to do with the need for backups to protect against disk failure. URE and disk failure should not be confused. A URE is commonly...
- sub.mesa
- Post #51
- Nov 30, 2013
- Forum: Memory and Storage
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SSD Reliability these days...

Are you sure that is correct? As far as I recall, the internal SRAM is used for write-back, while external DRAM is (optionally) used for caching of the mapping tables. I could be wrong on Sandforce though, but at least this applies to other controllers like Intel X25-M, 320, S3500/S3700...
- sub.mesa
- Post #38
- Nov 30, 2013
- Forum: Memory and Storage
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ZFS - the next generation of data storage

I don't understand this. Because ZFS runs on UNIX people discard this. But people use Linux on their phones, and Mac OSX is built on FreeBSD. I don't hear them complaining. Even Synology - as well as most off-the-shelf NAS appliances - runs Linux. Of course the geeky world remains hidden from...
- sub.mesa
- Post #5
- Nov 30, 2013
- Forum: Memory and Storage
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ZFS - the next generation of data storage

Why would home users need End to End protection? Yes to protect their backups from contamination. But, what if you use ZFS send/receive for that? The fun thing is, RAID was supposed to provide reliable storage using cheap hardware. Hence the I of Inexpensive in the acronym RAID, though often...
- sub.mesa
- Post #4
- Nov 30, 2013
- Forum: Memory and Storage
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Seagate Desktop HDD.15 ST4000DM000

The ST4000VN000 would appear to be a bit newer, and also sports 5400rpm-class which is preferable for mass storage. Today, the regular Greens and Reds will get you 1000GB platter capacity. I believe the first 5TB drive with 4x 1250GB platters was also announced a while back. To lazy to google...
- sub.mesa
- Post #8
- Nov 30, 2013
- Forum: Memory and Storage
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ZFS - the next generation of data storage

It shocks me to see only one thread of the last 10 pages here on AnandTech are related to ZFS. Are you guys so old-fashioned, or hasn't the word reached Anand that ZFS provides reliable storage and modern features? Are there people using RAID here who do not know what ZFS is? Impossible...
- sub.mesa
- Thread
- Nov 30, 2013
- Replies: 16
- Forum: Memory and Storage
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SSD Reliability these days...

The issues can never be resolved because they are - in part - inherent to the design of the Sandforce controller. Due to the deduplication functionality, this SSD controller will always have an additional point of failure others SSDs don't have. Other SSDs only have a weakness in the unprotected...
- sub.mesa
- Post #36
- Nov 30, 2013
- Forum: Memory and Storage
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Terrible RAID 5 performance after upgrade

Show us the data! With data we can give you better advice. You're probably using Intel RST RAID; so next time include this very important information in your thread. I'd also like to see SMART attributes of your drives, gathered with CrystalDiskInfo for example. A screenshot of AS SSD would be...
- sub.mesa
- Post #4
- Nov 30, 2013
- Forum: Memory and Storage
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SSD vs Raptor

I would dispute that. They just have so low data density that uBER is not a problem for those drives. Only recent (~7 years) drives have problems with uBER and that's the reason they are not reliable enough to be used without redundancy and without backup.
- sub.mesa
- Post #42
- Nov 30, 2013
- Forum: Memory and Storage
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Just a queston regarding storage decisions

What you have is great. A bigger SSD just means lots of spent (wasted) money. Buy a bigger 4TB harddrive for the needs for the coming years if you like. 128GB SSD will be sufficient to hold your operating system and appliations and maybe a game or two. That's all you need. Harddrives are more...
- sub.mesa
- Post #5
- Nov 30, 2013
- Forum: Memory and Storage
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Seagate Desktop HDD.15 ST4000DM000

I'd recommend against the Seagate 7200.14. A friend of mine which owns these drives complains about regular clicking sounds due to background scanning looking for bad sectors. The power consumption is also much higher than that of competitor drives. It also runs 7200rpm. Depending on your...
- sub.mesa
- Post #6
- Nov 30, 2013
- Forum: Memory and Storage
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crucial m500 vs samsung evo

The 5000-hour bug was present in early firmwares of the Crucial M4 SSD. The M500 doesn't have this bug and appears to have a low failure rate. However, the same is true for some other SSDs. The M500 just has an edge over its current mainstream competitors when it comes to data protection.
- sub.mesa
- Post #15
- Nov 24, 2013
- Forum: Memory and Storage
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crucial m500 vs samsung evo

Very true. However, you seem to imply that when using an Uninterruptable Power Supply (UPS) you do not need capacitor protection. This is, however, not true. A UPS prevents power from going down in most cases. But the problem is much deeper than that. The SSD must receive a command (ATA standby...
- sub.mesa
- Post #8
- Nov 22, 2013
- Forum: Memory and Storage
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TRIM in RAID-0 on ICH9R? Any hope?

Not sure how many Sandforce-powered SSDs lack RAISE. I would think most of them do support it? In most cases, I can see it is disabled on the 60/64GB or 120/128GB version while being enabled on the higher capacity models. There is a lot of junk on the market, but out of all the popular models...
- sub.mesa
- Post #14
- Nov 20, 2013
- Forum: Memory and Storage
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TRIM in RAID-0 on ICH9R? Any hope?

Sounds plausible, since the Option ROM modification is probably to trick the drivers into believing it may utilise TRIM. Very curious if it actually works on your old ICH9. Somehow I think that the new (hacked) Option ROM might not work on ICH9 at all.
- sub.mesa
- Post #12
- Nov 20, 2013
- Forum: Memory and Storage

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