Sage Losing Database

MSWallack · 04-04-2024, 12:32 PM

Twice in the last few weeks, my Sage has run out of battery (each time when I thought I was at about 5%, once when I was walking to my charger...) and when I charged it and turned it back on, not only did it not know which book I was reading (or where in that book I was), it couldn't even find the book on the device! When I connected to Calibre I received a database error but when I ejected, the Sage updated the database and my book was back (though it thought that the book [and the last several that I've read] were new and not started). Any idea what's going on?

DNSB · 04-04-2024, 01:45 PM

One item to remember is that the database in memory and the database on the storage are loosely consistent. For speed, the storage copy is updated from the RAM copy when a certain amount of data has been written. An unexpected power outage can cause this mechanism to fail when not all the data is written. As many posts in these and other forums have mentioned, the battery gauge is not all that accurate so I try to avoid having the charge level drop below 10% before connecting to a charger.

I would suggest a restart before connecting to calibre which will write the database to storage and ensure that it is closed before the connection.

rashkae · 04-04-2024, 02:36 PM

Whether or not the battery meter is inaccurate, if the device drains it's battery past the time it can initiate a graceful shutdown, it is malfunctioning.

That being said, the reboots might be exposing some database error/corruption that has never been properly fixed. In the Kobo settings, it would be worthwhile to "Log Out" of the kobo account to clean out and refresh a new database. (Note, this will loose all current reading progress and annotations for sideloaded content.).

I would also add, if you are draining batteries to the very limit on purpose due to some old, very very outdated advice that you need to treat rechargeable batteries that way... pls stop doing so. It can still be helpful to calibrate battery meters this way, but it is in no way better for the battery.

MSWallack · 04-05-2024, 10:29 AM

Quote:

Originally Posted by rashkae

I would also add, if you are draining batteries to the very limit on purpose due to some old, very very outdated advice that you need to treat rechargeable batteries that way... pls stop doing so. It can still be helpful to calibrate battery meters this way, but it is in no way better for the battery.

Nope. I'm just lazy and/or forgetful.
Me to self: "Don't forget to charge your Kobo before you go to bed."
Self: Zzzzzz

04-04-2024, 12:32 PM	#1
MSWallack Right, Except When Wrong Posts: 353 Karma: 3968525 Join Date: Aug 2007 Location: Indianapolis Device: Kindle Oasis 3 (sometimes iPad Mini).	Sage Losing Database Twice in the last few weeks, my Sage has run out of battery (each time when I thought I was at about 5%, once when I was walking to my charger...) and when I charged it and turned it back on, not only did it not know which book I was reading (or where in that book I was), it couldn't even find the book on the device! When I connected to Calibre I received a database error but when I ejected, the Sage updated the database and my book was back (though it thought that the book [and the last several that I've read] were new and not started). Any idea what's going on?

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04-04-2024, 01:45 PM	#2
DNSB Bibliophagist Posts: 35,858 Karma: 145625116 Join Date: Jul 2010 Location: Vancouver Device: Kobo Sage, Forma, Clara HD, Lenovo M8 FHD, Paperwhite 4, Tolino epos	One item to remember is that the database in memory and the database on the storage are loosely consistent. For speed, the storage copy is updated from the RAM copy when a certain amount of data has been written. An unexpected power outage can cause this mechanism to fail when not all the data is written. As many posts in these and other forums have mentioned, the battery gauge is not all that accurate so I try to avoid having the charge level drop below 10% before connecting to a charger. I would suggest a restart before connecting to calibre which will write the database to storage and ensure that it is closed before the connection.

04-04-2024, 02:36 PM	#3
rashkae Wizard Posts: 1,173 Karma: 5061953 Join Date: Jun 2011 Location: Ontario, Canada Device: Kobo Aura HD	Whether or not the battery meter is inaccurate, if the device drains it's battery past the time it can initiate a graceful shutdown, it is malfunctioning. That being said, the reboots might be exposing some database error/corruption that has never been properly fixed. In the Kobo settings, it would be worthwhile to "Log Out" of the kobo account to clean out and refresh a new database. (Note, this will loose all current reading progress and annotations for sideloaded content.). I would also add, if you are draining batteries to the very limit on purpose due to some old, very very outdated advice that you need to treat rechargeable batteries that way... pls stop doing so. It can still be helpful to calibrate battery meters this way, but it is in no way better for the battery.