Illtud Daniel wrote: >Effrem Norwood wrote: > >>In addition, HSM software costs >>something (even if you write it yourself) on top of the tape infrastructure. >>One customer of ours was quoted 40K per TB of HSM *software* alone. >> > >I've got 25TB uncompressed of HSM here, and it's cost us (ex VAT) >roughly: > >£10k for the first 1.6TB (on NT, DLT library) >£18k for the next 6.0TB (on NT, LTO library) >£45k for the next 18.0TB (on Solaris, LTO Library) > >...for the software licencing alone. Plus about 10% pa. in support >costs. >You're looking at about 50-60% of the library cost for the HSM software >to manage it (tapes are another thing). Is HSM really that difficult? > >It really is a racket, but it's not so much compared with the >cost of re-producing the data (mainly digitized collections). >I'd be happier about it if they were more reliable (libs and s/w). >Disk arrays, on the other hand, would cost us a fortune in >upgrading the cooling - we've had to do this once just because of >the 3-4 TB of online storage we've got, and adding huge exchangers >(and associated pipes) isn't something I want to do much of. > I agree it's a total racket. I've spent an appalling amount of money on this stuff over the years considering how simple it is. Last year I finally built mtx, the open source tape library driver, and wrote my own software in tcl scripts for a new archiving system. It really is that simple, I don't know how they can charge so much for thier software, especially when some it is junk to begin with. -Kanoa > > >Oh, and having spent much of last night and this morning dealing >with multiple SCSI disk failures, and having seen about 5% of >ours fail in a year, I'm rapidly seeing the light on IDE. > - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
