This article explains why an SSD not detected message is displayed during SRX550 boot up.
SSD not detected
SSD (solid-state drive) is supported backup media for the SRX550. During SRX550 boot up, the warning below is sometimes encountered:
BIST check passed. PCIe: Initializing port 1 PCIe: Port 1 link active, 1 lanes, speed gen1 Boot Media: usb internal-compact-flash Net: octeth0 ide 0: Model: CF 2GB Firm: 20080112 Ser#: 0221 B 0000205897 Type: Removable Hard Disk Capacity: 2000.7 MB = 1.9 GB (4097520 x 512) Warning!!! SSD not detected POST Passed Press SPACE to abort autoboot in 1 seconds ELF file is 32 bit
This warning is given when the SSD is not detected.
This is a cosmetic issue. The SRX550 is working as designed.