I have a Knoppix 4.0 DVD that came bundled with a computer magazine. The DVD seems to run fine. Nevertheless I wanted to check data integrity by entering "testcd" at boot. The computer began checking files, but after a while the DVD drive was spinning down and the screen turned dark. When I pressed a key, the screen came back, and I could see that the computer was testing the KNOPPIX2 file when it got stuck. I tried testcd with two different computers and never got beyond the KNOPPIX2 file.
Can anybody confirm this issue? Is "testcd" supported by the DVD versions of Knoppix?
Western Digital 1TB WD Blue PC Desktop 3.5'' Internal CMR Hard Drive - WD10EARZ
$44.99
Western Digital 1TB WD Blue SA510 SATA SSD Internal 2.5”/7mm Cased - WDS100T3B0A
$89.99
SanDisk 1TB Extreme Portable SSD, External Solid State Drive - SDSSDE61-1T00-G25
$109.99
WF12F DELL 1TB 7.2K 6GBPS SATA 2.5'' HDD HARD DRIVE ST91000640NS 0WF12F
$25.00
Patriot P210 128GB 256GB 512GB 1TB 2TB 2.5" SATA 3 6GB/s Internal SSD PC/MAC Lot
$19.99
Samsung - Geek Squad Certified Refurbished 980 PRO 1TB Internal SSD PCIe Gen ...
$71.99
2 PACK Seagate ST1000LM035 Mobile HDD 1TB 2.5" SATA III Laptop Hard Drive
$26.85
Kingston NV2 1TB M.2 2280 NVMe PCIe Internal SSD Up to 3500 MB/s SNV2S/1000G
$60.99
1TB/2TB USB 3.0 Flash Drive Thumb U Disk Memory Stick Pen PC Laptop Storage lot
$580.99
Type C USB 3.0 Flash Drive Thumb Drive Memory Stick for PC Laptop 1TB 2TB lot
$703.19