diff --git a/target/linux/oxnas/files/drivers/ata/sata_oxnas.c b/target/linux/oxnas/files/drivers/ata/sata_oxnas.c
index 6e0f7a72a6..64231a8c70 100644
--- a/target/linux/oxnas/files/drivers/ata/sata_oxnas.c
+++ b/target/linux/oxnas/files/drivers/ata/sata_oxnas.c
@@ -70,7 +70,7 @@ struct sgdma_request {
 
 /* Controller information */
 enum {
-	SATA_OXNAS_MAX_PRD = 254,
+	SATA_OXNAS_MAX_PRD = 63,
 	SATA_OXNAS_DMA_SIZE = SATA_OXNAS_MAX_PRD *
 				sizeof(struct ata_bmdma_prd) +
 				sizeof(struct sgdma_request),
diff --git a/target/linux/oxnas/image/ox820.mk b/target/linux/oxnas/image/ox820.mk
index 2a9295bd97..99c438f149 100644
--- a/target/linux/oxnas/image/ox820.mk
+++ b/target/linux/oxnas/image/ox820.mk
@@ -68,10 +68,6 @@ define Device/shuttle_kd20
   DEVICE_VENDOR := Shuttle
   DEVICE_MODEL := KD20
   SUPPORTED_DEVICES += kd20
-  KERNEL_INITRAMFS_PREFIX = $$(IMAGE_PREFIX)-factory
-  KERNEL_INITRAMFS_SUFFIX := .tar.gz
-  KERNEL_INITRAMFS = kernel-bin | append-dtb | uImage none | omninas-factory | \
-	encrypt-3des sohmuntitnlaes
   DEVICE_PACKAGES := kmod-usb2-oxnas kmod-usb3 kmod-usb-ledtrig-usbport \
 	kmod-i2c-gpio kmod-rtc-pcf8563 kmod-gpio-beeper kmod-hwmon-drivetemp \
 	kmod-hwmon-gpiofan kmod-ata-oxnas-sata kmod-md-mod kmod-md-raid0 \