Here is full console:
=> usb reset 1
(Re)start USB 1...
USB: Register 10011 NbrPorts 1
USB EHCI 1.00
scanning bus for devices... 2 USB Device(s) found
scanning bus for storage devices... 1 Storage Device(s) found
=> ext2ls usb 0:1
<DIR> 1024 .
<DIR> 1024 ..
<DIR> 1024 lost+found
<DIR> 1024 castorXX
<DIR> 1024 nos7.4.1b
=> makesinrec 0x1000000; ext2load usb 0:1 2000000 castorXX/uImage;ext2load usb 0:1 3000000 castorXX/ramdisk.image;ext2load usb 0:1 4000000 castorXX/silkworm_bd131.dtb; bootm 2000000 3000000 4000000
Loading file "castorXX/uImage" from usb device 0:1 (usbda1)
3545060 bytes read
Loading file "castorXX/ramdisk.image" from usb device 0:1 (usbda1)
6686011 bytes read
Loading file "castorXX/silkworm_bd131.dtb" from usb device 0:1 (usbda1)
20944 bytes read
WARNING: adjusting available memory to 30000000
## Booting kernel from Legacy Image at 02000000 ...
Image Name: Linux-2.6.34.6
Image Type: PowerPC Linux Kernel Image (gzip compressed)
Data Size: 3544996 Bytes = 3.4 MiB
Load Address: 00000000
Entry Point: 00000000
Verifying Checksum ... OK
## Loading init Ramdisk from Legacy Image at 03000000 ...
Image Name: ramdisk.v0
Image Type: PowerPC Linux RAMDisk Image (gzip compressed)
Data Size: 6685947 Bytes = 6.4 MiB
Load Address: 00000000
Entry Point: 00000000
Verifying Checksum ... OK
## Flattened Device Tree blob at 04000000
Booting using the fdt blob at 0x4000000
Uncompressing Kernel Image ... OK
Loading Ramdisk to 2f99f000, end 2ffff4fb ... OK
Loading Device Tree to 00ff7000, end 00fff1cf ... OK
this is quiet!
end of DRAM 8589930496 memstart_addr0 total_lowmem 8589930496
setup_arch: bootmem
mpc85xx_pb_setup_arch()
arch: exit
network namespace NR (VRF) started
mmod_sysctl_inited: 1
Fman microcode 51 45 46
FMAN microcode UC size 0x1b64
default MII is 0xc1524000 for tsec0
default MII is 0xc1528000 for tsec0
Uboot wdt counter value: 0
EXT4-fs error (device ram0): ext4_mb_generate_buddy: EXT4-fs: group 0: 588 blocks in bitmap, 746 in gd
EXT4-fs error (device ram0): ext4_mb_generate_buddy: EXT4-fs: group 1: 869 blocks in bitmap, 311 in gd
Welcome to the Cobra platform NetBoot
Special Netboot image for Cobra platforms
bash-2.04# dmesg | grep sd[abc]
sd 0:0:0:0: [sda] 16076592 512-byte logical blocks: (8.23 GB/7.66 GiB)
sd 0:0:0:0: [sda] Write Protect is off
sd 0:0:0:0: [sda] Mode Sense: 23 00 00 00
sda: sda1 sda2 sda3 sda4
sd 0:0:0:0: [sda] Attached SCSI removable disk
sd 1:0:0:0: [sdb] 3911680 512-byte logical blocks: (2.00 GB/1.86 GiB)
sd 1:0:0:0: [sdb] Write Protect is off
sd 1:0:0:0: [sdb] Mode Sense: 23 00 00 00
sdb: sdb1
sd 1:0:0:0: [sdb] Attached SCSI removable disk
bash-2.04# mount -t ext2 /dev/sdb1 /load
bash-2.04# cd /load
bash-2.04# cd nos7.4.1b/
bash-2.04# ls -lh inst*
-rwxr-xr-x 1 65534 65534 55.2k Jun 13 2021 install
-rwxr-xr-x 1 65534 65534 6.8k Jun 13 2021 install_verify
bash-2.04# ./install release
bash: ./install: No such file or directory