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pmenadue
Paper Tape
Posts: 5
Registered: ‎11-27-2010
Location: Sydney
Views: 643
Message 1 of 2

T420S - Which UEFI? Windows 8 beta or Normal one?

Hi there,

 

I have a T420S running Windows 7 and UEFI boot (the latest - 8CUJ14UC) - works fine. I am about to move to Windows 8 and I have seen a Beta Windows 8 UEFI which is based on 8CUJ13UC, but seems to incorporate some Win 8 UEFI enhancements for Bitlocker (and perhaps other things?).

 

Anyone else have experience with this - and would you recommend normal production UEFI or the beta specifically for Windows 8.

 

See this:

http://support.lenovo.com/en_US/downloads/detail.page?&DocID=DS029925

 

Enhancements seem as:

CHANGES IN THIS RELEASE
  Version 1.33a

[Important updates]
  Nothing.

[New functions or enhancements]
- Support EFI_STORAGE_SECURITY_COMMAND_PROTOCOL for eDrive
- Support EFI_DHCP4_PROTOCOL/EFI_IP4_PROTOCOL for BitLocker Network Unlock
  (no IPv6 support)
- Support TPer Reset Command for eDrive

[Problem fixes]
- Fixed BitLocker failure in case of Windows 8 with UEFI mode
- Fixed EFI_STORAGE_SECURITY_COMMAND_PROTOCOL to support DMA transfer
- Fixed failed to boot from Windows To Go USB device

pleon
802.11n
Posts: 305
Registered: ‎12-01-2009
Location: Czech Republic
Views: 581
Message 2 of 2

Re: T420S - Which UEFI? Windows 8 beta or Normal one?

I have Windows 7 and Windows 8 both on separated partitions installed, i use UEFI. I have no problems at all. Windows 8 i have installed with BIOS 1.33, then i upgraded to 1.33a and now i am updated on 1.34 version and no problems at all. True is i do not use bitlocker on system partition (only on external discs), because i use bult-in encryption of Intel SSD 320.
----------------------------------------------------
Lenovo T440s, 20AQ0067MC, Windows 8.1 Pro x64 UEFI, Samsung 840 EVO SSD 250 GB, 8 GB RAM
Lenovo T430s, 2356LQG, Windows 8.1 Pro x64 UEFI, Intel 520 SSD 180 GB, 8 GB RAM
Lenovo T420s, 4171-6SG, Windows 8 Pro x64 UEFI, Intel 320 SSD 120 GB, 8 GB RAM
Lenovo T400s, 2808-CYG, Windows 7 Ultimate x64

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