parity

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  1. parity

    Need opinions on choice of RAID

    not cost effective to lose four drives out of twelve which would be the case with two RAID6 array. =/
  2. parity

    Need opinions on choice of RAID

    I'd prefer to run smaller arrays, but I'm worried about problems with RAID 5. A few times. Mostly in smaller RAID5s though (by today's standards at least, under 3TB). This is what I'm afraid of and why I'm considering RAID6 10x1TB. I don't want to lose the data. I don't have the ability to do frequent backups, so I need to choose the best cost effective implementation to insure data is kept intact and not lost. The one time I had this happen it took something like 50 hours on an Areca ARC-1680. That's 50 hours of vulnerability to a 2nd disk failure.... not something to be looked onto well with a mission-critical situation. Unfortunately, I purchased an Areca ARC-1231 prior to the release of the Areca ARC-1680. I've read that rebuild times are faster with the newer Intel IOP. If I choose to create the larger RAID6 10x1TB array, I increase rebuild times, increase chance of failure, but also gain an additional parity drive which would insure data integrity, that would help against losing the array during a rebuild. I have no idea how long it would take to rebuild a RAID6 7+TB array rebuilding with the Intel IOP341.
  3. To preface, I'm aware of the benefits of both RAID choices. RAID 6 allows additional fault tolerance and data consistency from the second parity drive. RAID 5 allows for faster writes. In this specific implementation, splitting into two RAID 5 arrays would allow for easy upgrades in the future. One array could be removed, new drives inserted, and data could be mirrored onto a new array when required. The procedure could then be repeated on the second array. If RAID 6 were implemented, to mirror data, a second machine and RAID controller would be needed. My questions concern the practical application with respect to rebuild times, corruption of data (RAID 5). How often have people experienced corruption issues in RAID 5 volumes where the parity drive hosed all the data? How long are typical RAID 5 rebuilds with arrays between 3-5TB? All feedback would be appreciated. RAID 5 -- (2 arrays) ------------------------ 5x 1000gb = 3724gb 5x 1000gb = 3724gb ------------------------ Total........... 7448gb or RAID 6 -- (1 array.) ------------------------ 10x 1000gb = 7448gb
  4. parity

    Samsung F series?!

    I have 8 of these 750gb drives and one of them benches like that. The rest have the typical low 70s average read rate. All of the drives were purchased at once and are within a 20 serial number range. It's interesting to note the different access times. The burst rate is being inflated by the Areca controller's 256mb of cache. http://xs227.xs.to/xs227/08185/hdtune_benc...d753lj_1716.png http://xs227.xs.to/xs227/08185/hdtune_benc...d753lj_2591.png http://xs227.xs.to/xs227/08185/hdtune_benc...d753lj_3300.png http://xs227.xs.to/xs227/08185/hdtune_benc...d753lj_4477.png http://xs227.xs.to/xs227/08185/hdtune_benc...d753lj_5281.png http://xs227.xs.to/xs227/08185/hdtune_benc...d753lj_6677.png http://xs227.xs.to/xs227/08185/hdtune_benc...d753lj_7262.png http://xs227.xs.to/xs227/08185/hdtune_benc...d753lj_8794.png Inglix, so you are not experiencing issues using Samsung 750gb drives with an Areca Controller? The latest HDD compatibility list dated 04/09/08 lists possible problems when using 750gb or 1TB capacity Samsung F1 series drives. http://www.areca.us//support/download/Raid...ibilityList.zip
  5. parity

    Samsung warrantys

    If you find a 3 year warranty on the Samsung site, please let us know. When I looked at the Spinpoint T166 (HD501LJ), for example: "Warranty information for HD501LJ - parts : 12 months, labor : 12 months." Others I checked are similar. If a company warrantees something for a year, they are either telling potential customers something about the expected longevity and what they're willing to stand behind on that product because of it -- or that they are simply cheap on the customer service end. Read the user reviews, such as at Newegg and elsewhere, to see what many users have to say of Samsung longevity (the ones who have had it longer than a month or two). I found a link and posted it to a large bulletin board a few months ago. Sadly their threads get pruned within 2-3 weeks, so it's gone. I'll try to find it again, but can't promise anything. Samsung's website is a real pain in the ass to locate information.
  6. parity

    Samsung warrantys

    I'm pretty sure it's 3 years for all hard drives. Although Samsung does have conflicting information posted which implies 12 months parts, 12 months labor on individual product pages on the consumer website.
  7. parity

    Samsung SpinPoint F2 Details!

    There was an article published on a ziff davis chinese website a month ago when Samsung made the announcement of a 1.5TB drive in 2008. That article clearly stated twice that the 1.5TB drive would be 4 platters.. This would mean.. 1500GB = 4x 375GB/platter http://www.google.com/translate?u=http%3A%...=en&ie=UTF8
  8. parity

    Samsung F series?!

    There was an article published on a ziff davis chinese website a month ago when Samsung made the announcement of a 1.5TB drive in 2008. That article clearly stated twice that the 1.5TB drive would be 4 platters.. This would mean.. 1500GB = 4x 375GB/platter http://www.google.com/translate?u=http%3A%...=en&ie=UTF8
  9. parity

    SEAGATE IS RIPPING US OFF

    Sorry for grammar errors in the previous post. Storage review only allows a user to edit posts for a few minutes after the initial submission .
  10. parity

    SEAGATE IS RIPPING US OFF

    If I read his post correctly, **Special K** stated that the hard drive sticker on the cover of fives Seagate hard drives lists the model as ST3500320AS. However, when he checks the bios, through utilities, or through 3ware Management software-3DM2, those five drives are indicated as ST3500820AS. An attempt at fraud would not be easy for Newegg to accomplish. Visible traces would potentially exist on the hard drive covering where adhesive from the old sticker used to reside. Further if the Anti-static bag should no signs of tampering, (again, adhesive sticks to these bags even when removed), then it does not point to the distributor, but a error originating at the factory.
  11. Is anyone privy to information which explains the change in designation of the 2nd letter?
  12. parity

    Samsung F series?!

    Samsung F1 1TB http://www.newegg.com/Product/Product.aspx...N82E16822152100 Samsung F1 750GB http://www.newegg.com/Product/Product.aspx...N82E16822152102 Looks like Samsung is pushing out the top end models first. Hopefully it won't be long until the 640GB model is shipped.
  13. Highpoint traditionally hasn't been synonymous with performance. The majority of their legacy products did not include a dedicated XOR processor, but lately Highpoint has changed this trend with the 3320 & now with the 3520 card. Anyone put one of these through its paces yet?
  14. It seems there is no information listed for 7200.10 drives in the Storage Review Reliability Database. Is there a reason for this? Are these statistics available? Do the 7200.10 drives emit an annoying audible whine at idle ever minute or so that can be heard when in close proximity to a workstation? ( Seagate's STIR -Seek To Improve Reliability self-test) Thanks