Raid 5?

Discussion in 'OT Technology' started by psujeeperman02, Mar 21, 2006.

  1. psujeeperman02

    psujeeperman02 "Hi Sal"

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    Anyone have a simple definition of what RAID 5 is and how it works?
     
  2. kYd

    kYd New Member

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  3. CyberBullets

    CyberBullets I reach to the sky, and call out your name. If I c

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    Pff. Raid 6 or nothing!
     
  4. deusexaethera

    deusexaethera OT Supporter

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    RAID achieves higher data transfer speeds without sacrificing safety by storing just enough "parity" data that it can reconstruct exactly 1 disk's worth of "real" data. There may be exceptions, but this is the rule.

    RAID 0 is where all drives store "real" data and none store "parity" data. This is very fast and very dangerous, because if one drive fails, all the data is useless.

    RAID 1 is where half of the drives store "real" data and the other half store an exact copy of that data. It's faster for reading, but not for writing, and it is very safe. Half of the drives can fail with no ill effect.

    RAID 3 is where the last drive in the array stores all of the "parity" data. This is faster for reading large files, but slower for writing, because ALL of the writes have to change the parity data on the one parity drive.

    RAID 5 is where the "parity" data is distributed evenly across all of the drives. This tends to make it very versatile, because the changes to the parity data aren't bottlenecked into a single drive.
     
  5. mysteryman

    mysteryman OT Supporter

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  6. Peyomp

    Peyomp New Member

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    Nice water bottles. While yoiu're at it: RAID-Z forever Sun 10 YES!
     
  7. Harry Caray

    Harry Caray Fine purveyor of x.264, h.264 & TS HD-Video !!! HD

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    RAID-Z sucks.....

    Which is why most enterprise Sun systems all use SAN connected storage systems (aka IBM Sharks, EMC Symetrix's, etc.)... all Fiberchannel, 10gb Ethernet, etc...

    All RAID-5..

    Get with the times :rolleyes:

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  8. Peyomp

    Peyomp New Member

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    I'm gonna have to say that you are incorrect. ZFS has a really impressive featureset.
     
  9. Harry Caray

    Harry Caray Fine purveyor of x.264, h.264 & TS HD-Video !!! HD

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    Yea..:rolleyes:

    that's why all the Sunfire 4800's and StorEDGE systems use RAID-5 by choice HUH?.....

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  10. Peyomp

    Peyomp New Member

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    I love the sarcasm over RAID-Z. Its great. Could that be because RAID-Z is new? Do you even know what it is, eye roll boy?
     
  11. Peyomp

    Peyomp New Member

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  12. Harry Caray

    Harry Caray Fine purveyor of x.264, h.264 & TS HD-Video !!! HD

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    Yea.. it's been around since Solaris 8... and now we're at 10.... and Sun isn't using it in none of their enterprise systems....:rolleyes:

    none of the big companies use Sun as a storage player because THEY ARE NOT A SAN PLAYER....

    In the SAN world... only 3 companies are players... IBM (Total Storage..aka "Shark Server") ...EMC "Symetrix"..StorageTek

    Any other "IT" person who tells you other wise doesn't know shit... also probably thinks that 1gb Ethernet is the "new thing" or Dual Channel 2gb FC is cool :rofl:

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  13. Peyomp

    Peyomp New Member

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    I don't need a fucking SAN. You're spewing alot of bullshit, and very little facts. Its not raising your status, its just making you look like a pissant.
     
  14. Harry Caray

    Harry Caray Fine purveyor of x.264, h.264 & TS HD-Video !!! HD

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    HA !!! I deal with SAN's ALL DAY LONG !!! It's what I do... and I could give a shit about my status or what it makes me look like to you..

    I get paid 6 figs as a UNIX/Linux/SAN admin..

    Trust me... I know

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    Geek by Nature. Linux by Choice.
     
  15. Peyomp

    Peyomp New Member

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    And yet you haven't actually made a single comment on the merits of RAID-Z. You've just talked shit and used logical fallacies. You are a total fucking idiot. Congratulations with that. :)
     
  16. Peyomp

    Peyomp New Member

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    You're a tool.

    Jeff Bonwick is not: http://blogs.sun.com/roller/page/bonwick?catname=/ZFS
     
  17. Mikey D

    Mikey D New Member

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    StorageTek is SUN :ugh:

    Guess you missed that memo :mamoru:
     
  18. keleko

    keleko yes, he is

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  19. crontab

    crontab (uid = 0)

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    Don't worry, there are only 3 major player in the SAN world. LOL. Nobody uses Hitachi, HP, I mean Compaq, no wait, I mean Digital, 3par, NetApp, etc...

    Mr. SAN Carey over here... I assume you attend the SNIA events. Which ones? I haven't seen such a character in any.

    Nice use of flailing the limp e-dick in here. Seems like most threads about raid turn into that...
     
  20. Mikey D

    Mikey D New Member

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    I was going to bring up Hitachi but decided the SUN/STK thing was funny enough :hs:
     
  21. Peyomp

    Peyomp New Member

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    I'd just like to say that I think RAID-Z is cool.
     
  22. deusexaethera

    deusexaethera OT Supporter

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    We have an IBM SAN at my office. 40 disks, 2 terabytes, fiber channel, very nice. The sad part is that the overall bandwidth is so bottlenecked by the server that manages it that I could build a simple 4-disk RAID5 with 1 hotspare and match the storage capacity and transfer speed.
     

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