Stock ROMのインストール - 65％のErra Assertに失敗しました：write_raw_image（ "/ tmp / oemsbl2.img"、 "oemsbl2"）ステータス（7）、インストールが中止されました -- clockworkmod-recovery フィールド と bootloader フィールド と zte-blade フィールド android 関連 問題

So, that is the problem. I tried to search at google but no luck, only responses were boot.img, and those are not the same. updater-script:

assert(package_extract_file("boot.img", "/tmp/boot.img"),        write_raw_image("/tmp/boot.img", "boot"),        delete("/tmp/boot.img")); set_oemsbl_size(494552); assert(package_extract_file("oemsbl.mbn", "/tmp/oemsbl2.img"),        write_raw_image("/tmp/oemsbl2.img", "oemsbl2"),        delete("/tmp/oemsbl2.img")); assert(package_extract_file("amss.mbn", "/tmp/amss.img"),        write_raw_image("/tmp/amss.img", "amss"),        delete("/tmp/amss.img")); assert(package_extract_file("splash.img", "/tmp/splash.img"),        write_raw_image("/tmp/splash.img", "splash"),        delete("/tmp/splash.img")); set_appsbl_size(66328); assert(package_extract_file("appsboot.mbn", "/tmp/appsbl.img"),        write_raw_image("/tmp/appsbl.img", "appsbl"),        delete("/tmp/appsbl.img")); 

Yes, it works. It is just a read error, but the installation is complete. On Blade 2, I had the same issue. nandbackup from CWM didn't work - this is a stock rom flashed thru CWM, and it works :)

It is very likely a CWM issue.