This message occurring during boot up of KNOPPIX-Live has no deleterious consequences but it is an annoyance.
It is probably an unintended hangover from the HD-installed version which allocates several partitions.
Either ignore it or include a (2nd and) 3rd (and 4th) partition in your boot device, even if it is a USB stick.
Use fdisk* to set /dev/{sda}1 as the KNOPPIX partition type c (being FAT32; or NTFS if you prefer - I've never tried this).
Set /dev/{sda}3 as type 83 (Linux) (at least 400M). Then format it as Reiserfs with mkreiserfs .
It's not obvious to me how (or even whether) the partition is used; but it is made available; and you will boot
without the annoying error message!
(*) Yes: you need to format your intended USB device - from a temporary KNOPPIX USB device is probably your most
convenient method ;o)
AUDIO CODES MP-114 VOIP Gateway Open Box
$37.49
$199.99
Grandstream GS-HT802 2 Port Analog Telephone Adapter VoIP Phone & Device, Black
$32.00
VoIP IP Phone SIP WAN FV6020 Fanvil Gigabit Office Support IAX IAX2
$35.56
Cisco CP-7945G VOIP Phone With Stand & Handset Business IP Phone 7945
$3.00
New Cisco 7945G IP VoIP Gigabit GIGE Telephone Phone CP-7945G -
$24.95
Cisco CP-8841-K9 5 Programmable Line Key 5 inch. Color VoIP Phone SIP
$24.95
Yealink SIP-T41P PoE Ultra Elegant VoIP Phone
$29.95
Cisco 8841 CP-8841-K9 VoIP Business IP Phone (Charcoal)
$47.99
LOT OF 10 Cisco CP-7841-K9 VoIP 4-Line Business Phone w/ Stand Handset Cord
$69.99