Question

how did the magnetic drum improve computers

Answer 1

Drums were displaced as primary computer memory by magnetic core memory, which offered a better balance of size, speed, cost, reliability and potential for further improvements. Drums in turn were replaced by hard disk drives for secondary storage, which were both less expensive and offered denser storage

Answer 2

• ᴅʀᴜᴍs ᴡᴇʀᴇ ᴅɪsᴘʟᴀᴄᴇᴅ ᴀs ᴘʀɪᴍᴀʀʏ ᴄᴏᴍᴘᴜᴛᴇʀ ᴍᴇᴍᴏʀʏ ʙʏ ᴍᴀɢɴᴇᴛɪᴄ ᴄᴏʀᴇ ᴍᴇᴍᴏʀʏ, ᴡʜɪᴄʜ ᴏғғᴇʀᴇᴅ ᴀ ʙᴇᴛᴛᴇʀ ʙᴀʟᴀɴᴄᴇ ᴏғ sɪᴢᴇ, sᴘᴇᴇᴅ, ᴄᴏsᴛ, ʀᴇʟɪᴀʙɪʟɪᴛʏ ᴀɴᴅ ᴘᴏᴛᴇɴᴛɪᴀʟ ғᴏʀ ғᴜʀᴛʜᴇʀ ɪᴍᴘʀᴏᴠᴇᴍᴇɴᴛs. ᴅʀᴜᴍs ɪɴ ᴛᴜʀɴ ᴡᴇʀᴇ ʀᴇᴘʟᴀᴄᴇᴅ ʙʏ ʜᴀʀᴅ ᴅɪsᴋ ᴅʀɪᴠᴇs ғᴏʀ sᴇᴄᴏɴᴅᴀʀʏ sᴛᴏʀᴀɢᴇ, ᴡʜɪᴄʜ ᴡᴇʀᴇ ʙᴏᴛʜ ʟᴇss ᴇxᴘᴇɴsɪᴠᴇ ᴀɴᴅ ᴏғғᴇʀᴇᴅ ᴅᴇɴsᴇʀ sᴛᴏʀᴀɢᴇ.