SuperDuper stalling (again)
G5 dual 2Ghz (OS X 10.4.7) copying from stock HD (160GB) to WD Raptor 150GB.
1st attempt: SD stalled, would not quit, and froze OS. Reboot OK but Disc Utility could not find HD's. Reboot again. 2nd attempt: SD stalled (elapsed time: 1.5 hours)but copied more. Ran lsof with last 2 lines reading: SDCopy 704 root 22r VREG 14,5 19405824 13509351 /Users/Shared/earthbrowser2.db SDCopy 704 root 23u VREG stat(/Volumes/Raptor/Users/Shared/earthbrowser2.db): Operation timed out Advice? [Edit: SD will not quit or force quit yet again on the above 2nd attempt. Other applications failing to respond as well. Need to reboot again!] |
If things are failing to despond, it seems likely that the database above is corrupt or the destination volume is failing to respond due to I/O errors.
Remember: we can't "freeze the OS". We don't have the ability or privileges to do so. We can trigger a freeze in the kernel by simply copying a file that fails, bhe OS is freezing due to low-level I/O problems, well "under" our operation. So -- what happens if you try to duplicate the earthbrowser2 database above using Finder? |
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Right, I understand how it appears, which is why I offered up an explanation. :)
OK, then perhaps the problem is your destination. Is it an internal drive? If so, SATA or ATA? |
Dnanian,
Both drives are internal SATA. |
OK. The implication in this post and the referenced tech note from WD implies that there are issues with the Raptor and some 400+ GB models (too) and the onboard SATA controller. This might explain your problem...
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Right, Dnanian. Although I hooked it up recently, instability only occurred when I started to use SD. Perhaps intensive read/writes triggers it? I will acquire a PCI sata card and report back with the results.
I appreciate the help. |
I think that's exactly right: intensive I/O probably triggers the problem, whereas "mellower" access works.
I'll await your follow-up. Be aware that not all PCI SATA controllers allow boot... you might want to make sure yours does, or get a non-WD drive as the 2nd one. |
Udate:
I installed a Firmtek PCI SATA card and hooked it up to the new WD raptor. SuperDuper copied to it without a hiccup and without any of the previous instability problems. Case closed. Thanks, again, dnanian. |
Great, glad to hear it. It's one of the more obscure OSX incompatibilities out there, I know, but I'm glad I was able to point you in the right direction.
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