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Gnomeface
Occasional Visitor
Joined: Jul 03, 2006
Posts: 14
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 Posted: Sun Jan 13, 2008 11:44 pm Post subject: TTOne SD Card Speed |
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Sorry if this has been posted before, but thought it might be useful for basic TTOne users to know the practical effect of different speed SD cards.
I've just upgraded my TTOne (v5 to v7 software + latest UK maps) and needed to move from the 128Mb SD card to a 256Mb, so I used the newish standard Integral card from my camera (after reformatting). The TT then took 20-25 seconds to shut down, every time, instead of the original 4-5 seconds - although everything else seemed OK.
So I bought a high speed Integral card for about £6 and now the TT is back to around 4 seconds to shut down. For completeness, tried reformatting the original card again and reloading it but still 25 seconds to shut down with the slower card.
Maybe there are other effects, but it is quite obvious that the standard SD cards (1.5Mb/sec write speed) are far too slow and you need a 10Mb/sec write speed. Having said that, what the h*ll is all the data the TT is writing at shut-down? |
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TVR
Pocket GPS Verifier
Joined: Nov 15, 2006
Posts: 128
Location: Selby, Yorkshire
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| Posted: Mon Jan 14, 2008 6:59 pm Post subject: |
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Hi Gnomeface,
I think you need to review your SD card. 256MB is still a little small. Try ti aim for a 2GB High speed card (x150 or higher). If you search amazon for sd x150, you should find it ok. Hang on...
try this
TT is writing your current position and the route you currently have planned. This will also include POI amendments, mapshare etc...
Hope this helps you out.
TTFN
NB- DO NOT GO FOR THE 4GB SDHC. This format does NOT WORK in TT devices.
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TVR
Sygic for android in HD
Cameralert - pending
TomTom consigned to the bin, after 6 years loyal service. |
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Andy_P
Pocket GPS Moderator
Joined: Jun 04, 2005
Posts: 19991
Location: West and Southwest London
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dhn
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Joined: Oct 08, 2007
Posts: 2544
Location: Toronto CANADA
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| Posted: Mon Jan 14, 2008 7:09 pm Post subject: |
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| TVR wrote: |
NB- DO NOT GO FOR THE 4GB SDHC. This format does NOT WORK in TT devices. |
Yeah, they do......for the 720 and 920 series....at least here in North America |
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Gnomeface
Occasional Visitor
Joined: Jul 03, 2006
Posts: 14
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| Posted: Mon Jan 14, 2008 7:22 pm Post subject: |
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| TVR wrote: | | ...I think you need to review your SD card. 256MB is still a little small. |
As it's for UK maps only it's fine for me, even with the detailed speed camera lists and voices, my own colour schemes, etc. Wish I had the latest Postcode file though - mine's so old it doesn't even have a ver file - but I'm waiting for TT to respond on that. Maybe the lack of a ver file was what stopped it from downloading a later version when I bought the new map?
| TVR wrote: | ...TT is writing your current position and the route you currently have planned. This will also include POI amendments, mapshare etc...
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Of course - thanks for that. The new high speed Integral card has restored the delay to an acceptable 3-4 seconds. |
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TVR
Pocket GPS Verifier
Joined: Nov 15, 2006
Posts: 128
Location: Selby, Yorkshire
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| Posted: Tue Jan 15, 2008 12:14 am Post subject: |
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Sorry guy's the line should have read:-
NB- DO NOT GO FOR THE 4GB SDHC. This format does NOT WORK in OUR TT devices.
apologies to 720 & 920 users. No "flames" intended.
_________________
TVR
Sygic for android in HD
Cameralert - pending
TomTom consigned to the bin, after 6 years loyal service. |
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