On Tue, Jan 20, 2009 at 2:26 PM, Moore, Joe <joe.mo...@siemens.com> wrote:
> > Other storage vendors have specific compatibility requirements for the > disks you are "allowed" to install in their chassis. > And again, the reason for those requirements is 99% about making money, not a technical one. If you go back far enough in time, nearly all of them at some point allowed non-approved disks into the system, or there was firmware available to flash unsupported drives to make them work. Heck, if you knew the right people you could still do that today... > > There isn't a need to explain the feature to the user? That's one of the > most irresponsible responses I've heard lately. A user is expecting their > 500GB disk to be 500000000 bytes, not 4999500 bytes, unless that feature is > explained. > The user DEFINITELY isn't expecting 500000000 bytes, or what you meant to say 500000000000 bytes, they're expecting 500GB. You know, 536,870,912,000 bytes. But even if the drive mfg's calculated it correctly, they wouldn't even be getting that due to filesystem overhead. Funny I haven't seen any posts to the list from you demanding that Sun release exact specifications for how much overhead is lost to metadata, snapshots, and filesystem structure... > > Parameters with reasonable defaults (and a reasonable way to change them) > allow users who care about the parameter and understand the tradeoffs > involved in changing from the default to make their system work better. > > If I didn't want to be able to tune my system for performance, I would be > running Windows. OpenSolaris is about transparency, not just Open Source. > If you fill the disks 100% full, you won't need to worry about performance. In fact, I would wager if the only space you have left on the device is the amount you lost to right-sizing, the pool will have already toppled over and died. Although I do agree with you, being able to change from the default behavior, in general, is a good idea. Agreeing on what that default behavior should be is probably another issue entirely ;) I would imagine this could be something set perhaps with a flag in bootenv.rc (or wherevever deemed appropriate).
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