imsabbel

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Everything posted by imsabbel

  1. imsabbel

    SSD - Most Important Metric

    For me on my computer? Maximum access latency. Seriously. With STR, ALL are more than fast enough. Same for read IOPS. Whats left is maximum latency: If the computer is blocked for a second because of some stupid write-io lag, than you notice it more than anything else. As long as there are no big blocking latencies, even 50 Write IOPS are fine on the desktop
  2. imsabbel

    Atoms for clustering

    If your power really was just the usage of the atoms, this would potentially even be interesting. But if you compare an Atom cluster with something in the line of a low power quad core, you get the following picture: For the raw power of one Core2 quad, you need at least 8 atoms. Those themself dont use that much power, but you needs a chipset for each, a nic for each (one GBit Port needs about as much power as the atom itself), etc.
  3. imsabbel

    Intel X25-M Impressions

    at you calling yourself a poweruser. If all you do is some zipping and virus scans, maybe you should just order whats right now cheapest @ dell...
  4. imsabbel

    Lifespan of SSD drives?

    Well, the problem kinda is that currently, no SSD has any possibility of knowing what free space to consolidate. As it is not FS-aware, all it can do is shuffle data around, not knowing if its full or empty. Thats why Fusion-IO is only really fast if you reserve part of the space as "always empty". Future driver / OSes will address this, though.
  5. Quite a feat, considering that you can only buy them for 4 months now. But yeah, they stayed expensive, because they can afford to be expensive. SLC performance == SLC price. Other SSDs otoh steadily approach the spotmarket price of flash, which has stabilized after the huuuuge drop a year ago. The combination of the initally large margins dropping, and the flash price collapse caused the enormous price drop SSDS had tha last 18 motnh. Considering that memory companies are right at the edge of collapse even with the current prices, and no golden bullets are in sight, this is at an end for the moment. I think it will take some time before the $1/Gbyte barrier for flash will be broken (i.e. not this year)
  6. imsabbel

    Samsung F2 Series

    Only 5W when writing...but this is a 5400 rpm drive Yeah. But i think i wouldnt care. My current F1 will be (excluding premature failure) my last non SSD system/program drive. And for media storage, evven 1500rpm would be more than enough Ah, and one thing i noticed: those 5.4k drives have not much lower spin-on currents than the 7.2k drives. As they only have half the energy in the platters, this should mean that they wake up much quicker from sleep, right?
  7. imsabbel

    Samsung F2 Series

    Well, it seems that after that F1 fiasco (how long did it take from announcement to delivery?), Samsung now took the opposit approach: Take a look here: http://geizhals.eu/a387810.html You can buy the 500Gbyte ecogreen F2 single disk drive now, its on stock at several of the biggest vendors. Anybody got one, or info when the inevidable 1.5Gbyte Samsung drive will arive then?
  8. imsabbel

    How to backup large array?

    1) It does not matter how many slots you have free in your tower. Many (if not most) things that would kill One raid 5 would also destroy the second in the same tower (think of fire, cathastrophic PSU failure, theft). 2) This means you need a seconds box anyway, so I would either suggest a NAS, or a second computer with you backup to regularily on the network. (NO mirroring. If its transparent, its also transparent to errors and no backup). 3) no tabe. Reasons: a) practiability: A robot seems to be way outside your budget, if you worry about slots in your case. You wouldnt like switching takes any more than switching HDs. price: if you dont want to work yourself silly, you would need 800Gbyte tapes. The cheapest LTO-4 drives i see around here are a bit above 1500€. Add to this 50€ per tape (thats about the same price as a 750Gbyte HD). For the money of even the cheapest tape drive, at current prices you could build a computer with 2 4TB raid 5s (2* 4 Seagate 1.5Tbyte raid 5, 2* highpoint 2310) to alternate snapshots. Just to give some perspective. For me, i also have a big raid, but i do not consider it 1 piece of storage. I have snapshotted online-backup for the most important 20-40Gbyte, keep a 2nd copy of the the "would be a hassle to rescan/digitize" stuff on external HDs (1 Tbyte or so), and the rest is just temporary stuff (uncompressed datasets, evaluation stuff) that can be recreated in about the same time as restoring an external backup would take, so no point in it.
  9. HM. I see 2 8GB sticks together here for 1.5k€. http://geizhals.eu/?cat=ramddr2regecc&xf=253_16384 4GB Modules are below 45€ nowadays, if you dont want the fastest speeds: http://geizhals.eu/?cat=ramddr2&xf=253_4096~256_1x So your 40Gbyte ramdrive would be at least... 500€? Doesnt sound that expensive, only twice the $/Gbyte than an intel SSD...
  10. imsabbel

    Has WD bit off own hand?

    STR doesnt matter nowadays. Nobody is buing velocirators because of it, at least.
  11. While i could imgine limits in theory (signal reflection delay times, etc.), i do not think that SATA is susceptible for them. Sata in notebooks often runs over just a few cm of film cables, and the mobile chipsets use (more or less) the same drivers than the desktop ones do.
  12. imsabbel

    SSD's = Defrag is a thing of the past?

    That has this to do with anything?
  13. I would really like some REAL benchmarks from a neutral source. While i appreciate the link in the OP, a page which proclaims itself as the sole distributed of the reviewed product doesnt really readiate credibility.
  14. imsabbel

    SSD's = Defrag is a thing of the past?

    The german C't magazin is testing MLC currently (and has been for some time). They stated they use a cheap 2GB USB stick with high transfer rate to archive lots of complete writes (the 2GB is to make sure it used recent MLC chips, and not some old crap). They do a complete write, read, and md5 hash comparison. Currently, the el cheapo stick is at >20k cycles, and not a bit lost yet. Its getting a cycle every 6 minutes, so lets see when it will fail... (And yeah, they showed that even cheap USB drives have wear leveling, as 10s of millions of writes to the "same" sector didnt do any damage)
  15. imsabbel

    SSD's = Defrag is a thing of the past?

    Are you for real? Seriously, everything better than a USB stick has relocation blocks. IIRC, the much hated OSC core drives have >1Gbyte of them. And even if a bit would fail without any kind of relocation possibility, there would just be a bad sector on your SSD.
  16. I'm not sure what you mean. Physical size is a huge issue, hence the move to serial buses for higher data transfer rates with fewer pins. Motherboard and chipset package real estate are very, very pricey commodities. Take a look at how big a 32GB SD-Card is. Think about just how many slots / how much memory you could put onto a full-sized PCI-E card. Routing the data on a 6+ Layer PCB is so much easier than pushing everything through cables..
  17. I think in the high-performance server area PCI-E (or similar direct attached busses) will be the future. As physical size is in no way limiting, why add a cable, two connectors and serializer/deserializer at both ends (with all the additional layers, overhead and latency) if you dont have to? Sure you need a driver, just like you would need for any different RAID controller, too... On desktop, i am not sure. But everything is shrinking. And take a look at many SSDs: You can pack everything in a 1.8" case with room to spare. Just compare the space needed for the SSD with the space needed for the power and SATA cable and connectors on the drive and the board. Also, they dont need airflow or any kind of fixed orientation, so there might be a lot At the very least, i think we will see some kind of powered SATA connector to reduce that annoyance.
  18. imsabbel

    Intel X25-M

    Well, at least where i got to school i learned how to read, mr. deficiency. Take a closer look at the post i replied to.
  19. imsabbel

    Intel X25-M

    There is a review of Intels new SSD tech online at: http://techreport.com/articles.x/15433 Seems like they werent kidding. While the low write STR hurts in a lot of benches, random IO, all kinds of reads and the power consumption looks rather well. For an MLC-drive, even sensational... P.S. I nearly forgot: Seems like we need 6GBps SATA faster than anticipated
  20. imsabbel

    Avoiding resonance: how?

    Man... if it's vibrating that bad, find out what drive/fan/whatever is causing the noise and RMA/replace it! I use CM stacker cases with: 12 x 150 raptors 12 x 300 velociraptors have not noticed any serious vibrations with them, filled to the max! I have a CM stacker, too. It was also pimped out by a silent computing shop with dampening mats and stuff. And still i get this "beating" effect if my two old 300GB Samsungs are spinning. (and that is even with those rubber-decoupled drive cages).
  21. Thats wrong. Cycle times for MLC are much lower than for SLC. Like orders of magnitude. Thats why its easier to run SLC more agressive.
  22. imsabbel

    SSD Reviews?

    You are the first person i have ever seen that had something good to say about the durability of sata connectors.
  23. imsabbel

    SSD Reviews?

    Well, not to mention the plain truth: Value based pricing. If the benches are really true (and i guess they could. Just looking at the board makes you realize they did quite some effort to get it fast), then this board yould replace at least a 6 rack-HE worth of SAS disks if IO is the limiting factor. 3K (or 5K for the 160GB version) would be an absolute steal, even if it would have to be replaced after. But on a totally different level: Noticing that ALL flash HDs (even the biggest ones) are just relatively small boards, i think making them PCI-E cards would be the most sensible thing in the long run, as soon as OS compatiblity has improved. I mean, why bother siphoning the stuff through SATA if you can just put it into the board? Intel shows us that even now, SATA is starting to get limited. Plus the Disks are so small that you cannot use standard bays anyway (1.8" is the same price and capacity as 2.5"...).
  24. imsabbel

    SSD Reviews?

    Neither are all those 15k SAS disks. And i guess you miss the whole _point_ of reviews: To show _that_ only a few of the tons of SSDs that are around are worth it. A review isnt pointless just because the subject of the review isnt worth the money. Your argument is basically that you dont need reviews because you read reviews somewhere. With that mindset, you could just scrap all other hd reviews on this site, too.
  25. imsabbel

    Intel X25-M

    I get 4-5s and I dont see 3s as a huge improvement. Thats why i need the SLC units. So that you can save 1 second more per day for when you start up photoshop the first time? Do you need the performance, or are you just looking for a way to waste money?