Thats the problem cant contact airtel device i fine signal is fine only hdd is faulty now that i have changed it i think i need the right formatIt has a unique boot loader signature. Probably formatted with FAT32 or ExFAT depending on the size of the hard disk or partition. The file system is decided by the manufacturer of the STB.
Better get Airtel to advise you. Though I am doubtful they can help and will suggest a replacement.
New and old size is same but as i said old hdd crashed so now way to find out format or allocation size@Dj1018 The best bet would be to reach out to Airtel and ask what's the process for replacing the hard disk. They might have a standard operating procedure for these kind of issues.
Having said that, what was the size of the old HDD and what's the size of the new HDD? What partition scheme does it use? MBR or GPT?