cosurgi said:
OK, I promise to post my benchmarks
You never know until you make a benchmark, like with bonnie++, or kernel copying or even kernel compilation times (which is HDD hungry too).
Heh... I'd be surprised, bluntly, if you accomplished anything.
Without hardware, you don't have "simultaneous" writes or reads going on, just sequencing from one to the other. This means you only can gain seek and rotational latency removal with Software RAID0. There is nothing of the sort of thing you'd gain with moving disks with RAID0 with soft-RAID.
While I won't say for definite, you're likely to see a slight to moderate degradation as you're having to split bits between both disks and you're no longer streaming data out of the devices.
[edit]
With the initial tests I've done with the SDHC's I've got, the performance was a push (As in no appreciable gain...)- which was the best you could hope for with this sort of configuration and flash stores.
Keep in mind, though, this is with a Core Duo E6550 and 4Gb of RAM. There IS an impact on this because I've got another core to futz with here.
Each read/write operation to each SDHC comes out of your cycles count... I will revisit this once I've got a Pandora in hand.
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Now, before you comment that you don't know until one runs a bonnie++ run, I can tell you about my years of experience with Linux, years of experience with RAID of all kinds, and fairly decent amount of knowledge and experience with the Linux SoftRAID framework (We're ripping LinuxMD based RAID1 out of a production, enterprise class system deployed in the thousands deployed right at the moment to do DRBD mirrored SINGLE SSD's on redundant ATCA server blades with Heartbeat for failover- because it doesn't bring reliability OR performance to the picture...)- I can state with certainty that the Linux SoftRAID does NOT work the way people think it does, nor that RAID itself works the way you'd think it does.
Eniko said:
Are the people who are getting a 32gb card just made out of money or am I missing something? Last I checked prices two 32gbs would cost more than the Pandora itself, while two 16gbs could go as low as 40 euros.
1) Yeah, they're made of money.
2) I'm doing firmware work followed by commercial app dev work.