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Old 12-03-2011, 11:47 AM   #1
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Floppy Annoyance

Is there any way I can disable Calibre from searching my A: drive? I upgraded to 8.29 and that behaviour is back again. It's not the end of the world but it is annoying.
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Old 12-03-2011, 12:39 PM   #2
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If you do not use the A: drive anymore (cannot imagine anybody still using it but I have been proven to be wrong before), you could try to disable it in the PC's BIOS settings, and/or via the device manager of your (Windows) OS.
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Old 12-03-2011, 12:43 PM   #3
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Surely Calibre shouldn't be accessing drives with removable media if they don't currently have any media in them, should it?
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Old 12-03-2011, 12:46 PM   #4
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This is almost certaintly something at the OS level doing this rather than Calibre itself.
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Old 12-03-2011, 12:55 PM   #5
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See https://bugs.launchpad.net/calibre/+bug/741632
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Old 12-03-2011, 01:27 PM   #6
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Drive A: (and B: ) are hardcoded/hardwired build-in left-over relics of non-mobile devices, but still valid when not de-activated. So searches over all drives will also include A:, B:, C:, etc. I do not think calibre should solve this.

For WinXP, there existed a tweak utility to let windows "know" not to use drive A, B by unchecking some check-box. Did a quick search for something similar on my Win7, but no luck (have no A/B floppy drive anyway).

Further, as windows allows renaming drive indications, drive A: might actually map to some exsisting external USB-drive. Another reason not to solve this in calibre.

Just my 2cts.
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Old 12-04-2011, 03:29 AM   #7
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OS level? Don't think so. I'm using XP and Calibre is polling the A: drive constantly, not the Kobo. I don't know why and shutting off the A: drive because of Calibre doesn't seem to be the right direction to me. As soon as I unmount the Kobo the polling stops. Something is in Calibre that's buggered.
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Old 12-04-2011, 04:41 AM   #8
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OS level? Don't think so. I'm using XP and Calibre is polling the A: drive constantly, not the Kobo. I don't know why and shutting off the A: drive because of Calibre doesn't seem to be the right direction to me. As soon as I unmount the Kobo the polling stops. Something is in Calibre that's buggered.
When calibre detects the kobo, it asks windows for the list of drives so it can mount the kobo's memory. This causes windows (not calibre) to poll A:. If the kobo is not completely detected (busted memory or an unknown drive string), the process repeats in a bit.

If you have a "fix" for this "bug", I am sure that Kovid would love to have it. He said as much in the bug report that I pointed toward.
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Old 12-04-2011, 08:02 AM   #9
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I don't anything about the phone and how it interfaces. If the issue is writing to an SD card, can't that writing be done to one of those little USB drives that mounts an SD card?
Then the card could be restored to the phone.
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Old 12-04-2011, 09:17 AM   #10
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When calibre detects the kobo, it asks windows for the list of drives so it can mount the kobo's memory. This causes windows (not calibre) to poll A:. If the kobo is not completely detected (busted memory or an unknown drive string), the process repeats in a bit.
Can you explain what you mean by "not completely detected"? In my naivety, I would have thought that a device would either be detected or not. What does "not completely detected" actually mean?
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Old 12-04-2011, 09:34 AM   #11
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Can you explain what you mean by "not completely detected"? In my naivety, I would have thought that a device would either be detected or not. What does "not completely detected" actually mean?
It means that some device connected to the computer has USB IDs that calibre recognizes, but that either no disk drive known by calibre to be associated with the device can be found or the disk drive cannot be written. This situation can arise because the device is non-standard, is new but reuses a previous USB ID, or has firmware changes that calibre doesn't know about. It can also happen if some device is presenting bogus USB IDs.
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Old 12-04-2011, 09:40 AM   #12
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I actually had to disable (within XP) the floppy drive because of the constant polling. No issues now.
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Old 12-04-2011, 10:10 AM   #13
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It means that some device connected to the computer has USB IDs that calibre recognizes, but that either no disk drive known by calibre to be associated with the device can be found or the disk drive cannot be written. This situation can arise because the device is non-standard, is new but reuses a previous USB ID, or has firmware changes that calibre doesn't know about. It can also happen if some device is presenting bogus USB IDs.
Thanks! I appreciate the explanation. Presumably the reason for the retry is in case the device simply hasn't finished initialising the USB connection, or something like that?
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Old 12-04-2011, 10:29 AM   #14
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Thanks! I appreciate the explanation. Presumably the reason for the retry is in case the device simply hasn't finished initialising the USB connection, or something like that?
That is one reason. Another is that the device might actually have been changed between scans.

I suppose we could detect that a given USB ID has failed N times in N tries and stop checking it until it disappears for a complete cycle (or something like that). My problem is that I have no motivation at all to take on this task, having neither a floppy drive nor a device that isn't fully recognized.
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Old 12-04-2011, 11:10 AM   #15
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I completely understand that. It's always difficult to justify spending time on coding for obscure error conditions.
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