Excessive disk activity when seeking

[markius]

TV-Server Version: 1.0 RC1 w/SVN
MediaPortal Version: 1.0 RC1 w/SVN
MediaPortal Skin: BlueTwo Wide
Windows Version: XP Pro SP2
CPU Type: Celeron M 360 (1.4GHz/400MHz/1Mb L2)
HDD: Seagate 300Gb 7200RPM SATA 150
Memory: 512MB PC4200
Motherboard: MSI Speedster-FA4 (MS-9625)
Video Card: Intel GMA 915
Video Card Driver:
Sound Card: Intel ICH6 HD Audio / Realtek ALC880
Sound Card AC3:
Sound Card Driver:
1. TV Card: Nebula DigiTV PCI
1. TV Card Type: DVB-T
1. TV Card Driver:
2. TV Card: Terratec Cinergy 2400i Dual Tuner
2. TV Card Type: DVB-T
2. TV Card Driver:
3. TV Card:
3. TV Card Type:
3. TV Card Driver:
4. TV Card:
4. TV Card Type:
4. TV Card Driver:
MPEG2 Video Codec: PureVideo
MPEG2 Audio Codec: PureVideo
h.264 Video Codec:
Satelite/CableTV Provider:
HTPC Case: Antec Aria
Cooling:
Power Supply:
Remote: MCE
TV: Samsung 26in LCD LW26A33W
TV - HTPC Connection: Sub-D

In single seat configuration, while there is a recording of a DVB-T radio programme in work, seeking a recorded TV program causes excessive disk activity.
Once the disk activity starts it's very difficult to control MP as it becomes very sluggish to the point of unresponsive. If I'm lucky I can stop the playback of DVB TV at which point the disk access returns to normal and MP becomes responsive again.

To reproduce this bug:

Record a DVB-T TV programme
Schedule a DVB-T radio programme
When DVB-T radio programme starts begin playback of DVB-T TV show
Seek +5 minutes

I can't produce logs at the moment as the system is very busy. I also can't confirm which SVN build I'm on but it's pretty recent... one of the last couple of weeks. [Why isn't there a Help/About... for MP??!]

For me this issue has been present since 1.0 RC1 baseline but I didn't use TV Server before that.

If anyone else can confirm this as a problem I'll pull in some logs.

Cheers
Mark