My server log displays the following error messages in RED:
kernel: sda: sda1 sda2 kernel: sd 0:1:0:0: [sda] No Caching mode page found kernel: sd 0:1:0:0: [sda] Assuming drive cache: write through kernel: sd 0:1:0:0: [sda] Attached SCSI disk
In your case the device doesn't have a caching mode page, so the kernel assumes there is no caching of reads or buffering of writes, and that therefore writes to the device will be "write through," i.e. will go directly to the media.
Is this error a hardware issue that needs rectification?