From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail.avantwave.com ([210.17.210.210]) by canuck.infradead.org with esmtps (Exim 4.43 #1 (Red Hat Linux)) id 1DDZNh-0001cZ-6B for linux-mtd@lists.infradead.org; Mon, 21 Mar 2005 21:44:34 -0500 Received: from [172.16.10.215] (chung.avantwave.com [172.16.10.215]) by mail.avantwave.com (8.12.10/8.12.10) with ESMTP id j2M2cdXb007185 for ; Tue, 22 Mar 2005 10:38:39 +0800 Message-ID: <423F87CC.10805@avantwave.com> Date: Tue, 22 Mar 2005 10:49:48 +0800 From: mike MIME-Version: 1.0 To: linux-mtd@lists.infradead.org References: <1ffb4b0705032109224f2c7805@mail.gmail.com> In-Reply-To: <1ffb4b0705032109224f2c7805@mail.gmail.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Subject: Re: mtd permission denied List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Hi all Also when i use jffs2 for data storage, i got these msg when mounting mtd. i have tried to erase and unlock the mtd , i got similar msg. Erase at 0x00080000 failed immediately: -EROFS. Is the sector locked? Erase at 0x00070000 failed immediately: -EROFS. Is the sector locked? Erase at 0x00060000 failed immediately: -EROFS. Is the sector locked? Erase at 0x00050000 failed immediately: -EROFS. Is the sector locked? Erase at 0x00040000 failed immediately: -EROFS. Is the sector locked? Erase at 0x00030000 failed immediately: -EROFS. Is the sector locked? Erase at 0x00020000 failed immediately: -EROFS. Is the sector locked? Erase at 0x00010000 failed immediately: -EROFS. Is the sector locked? Erase at 0x000f0000 failed immediately: -EROFS. Is the sector locked? Erase at 0x000e0000 failed immediately: -EROFS. Is the sector locked? Erase at 0x000d0000 failed immediately: -EROFS. Is the sector locked? Erase at 0x000c0000 failed immediately: -EROFS. Is the sector locked? Erase at 0x000b0000 failed immediately: -EROFS. Is the sector locked? Erase at 0x000a0000 failed immediately: -EROFS. Is the sector locked? Erase at 0x00090000 failed immediately: -EROFS. Is the sector locked? ~ # flash_eraseall /dev/mtd4 flash_eraseall: /dev/mtd4: Permission denied ~ # flash_unlock /dev/mtd4 Could not open mtd device: /dev/mtd4 ~ # mtd_debug info /dev/mtd4 mtd.type = MTD_NORFLASH mtd.flags = MTD_ERASEABLE mtd.size = 1048576 (1M) mtd.erasesize = 65536 (64K) mtd.oobblock = 0 mtd.oobsize = 0 mtd.ecctype = MTD_ECC_NONE regions = 0 Thanks for helping Mike,Lee Mike Lee wrote: >Hi all > i tried to flash_erase and other flash_* tools to my mtd device, the >return value is permission denied, but i am already root login. I have >selected MTD_CHAR and MTD_BLOCK in kernel. Do i miss somethings? > > My kernel version is 2.6.10, with cvs mtd patched. > >Mike,Lee > >______________________________________________________ >Linux MTD discussion mailing list >http://lists.infradead.org/mailman/listinfo/linux-mtd/ > > >