Like drum memory, the disks are spinning, so the head has to wait for the right section to come around.

就像鼓存储器一样，磁盘在旋转，因此磁头必须等待正确的部分出现。

While great for storage, this was not nearly fast enough for memory, so the RAMAC 305 also had drum memory and magnetic core memory.

虽然这对于存储来说非常好，但对于内存来说速度还不够快，因此 RAMAC 305 还具有磁鼓内存和磁芯内存。